"We're all out, so let's not mention it. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 info" Gao Lei rubbed her arm and said quickly.

"We don't have time to think about this, the time we just wasted, we speed up and get it back." Han Yue said with a serious face.

"Cheer up." Gao Lei clapped her hands and said.

Han Yue took the compass and said, "Over there, let's go!" ”

"Let's go! Let's make up for the time we just lost. Gao Lei waved her arms and lifted her morale.

"Let's go!"

This run lasted until noon, and everyone was like being fished out of the water, tired and thirsty, shouting, "No, no, rest, I ran for two hours at once, it's dying!" ”

"Han Yue is going in the right direction this time!" Qi asked slightly.

"This time it's right, I've been marking all the way since the new route, and we haven't encountered the marks I made along the way, which means we haven't made any more detours." Lu Haiyan said delicately.

"Really!" Li Meilan asked happily.

"Hmm!" Lu Haiyan nodded.

"Great, Haiyan really has yours." Bai Aihong said with a smile.

"Dangdangdang...... You see I've found a third reference. Han Yue tugged at the red cloth tied to the birch tree.

"Yay!" Ten people shouted in unison, hoarse.

"It's already noon, it looks like we're halfway there, and at this rate, we should be able to get back to the station by dinner." Qi smiled slightly, "We can eat and drink!" As he spoke, he opened the kettle, poured two large mouthfuls hard, and took a big bite of the compressed biscuits, but it was a tragedy all of a sudden, and she hurriedly poured water, but found that the water had been drunk for her along the way, and she was embarrassed to ask for others, so she had to choke in with her neck and slap her chest, "Oh my mother!" ”

"Give me the kettle?" Gao Lei walked to Qi Weiwei's side and said.

Qi said pitifully and pitifully, "I've already drunk all the water." As he spoke, he took off the kettle and handed it over.

Gao Lei took the kettle, opened her own kettle, and poured some of her own water for her.

"Squad leader." Qi sniffed slightly and said, "You are such a good person!" ”

"Gotta put away your cat pee! Save on some drinks. Gao Lei patted her on the shoulder and said.

&*&

Zhao Shuangxi leaned in front of Hua Junyao and said, "Junyao, you are telling me how to judge the direction in this field." "I've been thinking about this question all the way, but I'm embarrassed to ask, I'm tired from running, and when I talk again, my throat won't smoke anymore.

"Okay?" Hua Junyao drank some water.

Hua Junyao tightened the lid of the kettle and thought for a while, "In the absence of topographic maps and compasses in the wild, some features in nature can determine the direction. ”

"The sun is the most reliable compass. We know that the sun moves from east to west, and the shadow moves from west to east. For example, at six o'clock in the morning, the sun rises in the east, and the shadows of all objects are turned to the west; At twelve o'clock in the afternoon, the sun was due south, and the shadow was pointing north; By six o'clock in the afternoon, the sun was due west and the shadows were pointing east. ”

"We all know this, but this direction is too broad and needs to be specific." Chen Xinchun asked.

"Know the idiom of immediate results!" Hua Junyao looked at the gathered them and said.

"Yes!" Others also gathered around.

Hua Junyao picked up a branch and plunged it into the soil, and then said, "As the saying goes, "Immediate results", use a pole to make it perpendicular to the ground, and place a stone at the top of the benchmark shadow; In about 10 minutes, when the apex of the shadow of the benchmark is moved to 2, a stone is placed to connect the two points 1 and 2 into a straight line, the direction of this straight line is east-west, the direction perpendicular to the 12th parallel is north-south, and the end of the sun is south, and the opposite direction is north. ”

He looked at them with a smile and said, "According to this method, the higher and thinner the rod, the more perpendicular to the ground, and the longer the shadow moves, the more accurate the direction will be." looked at Li Meilan and said, "What time is it?" ”

Li Meilan raised her wrist and said, "It's 12:15." ”

"Try it for yourselves, around 12 noon. For example, the shadow length of 11:30 and 12:30 is almost equal, the line connecting the vertices is just pointing to the east-west direction, and the vertical line of the connecting line can also accurately point out the north-south direction. ”

"There's no sun, how can you tell if it's cloudy." Bai Aihong asked curiously.

Hua Junyao smiled and said, "In fact, there are many rough judgments about the direction in nature, as the saying goes: 'Everything grows by the sun', and the sun's thermal energy has formed many indirect characteristics in nature. Once you have mastered these characteristics, you can determine the direction even on cloudy days when there is no sun. For example, the grass on the south side near tree stumps, tree trunks and large boulders grows tall and luxuriant, and the grass on the south side also withers and yellows faster in winter. The bark is generally smooth in the south and rough in the north, with many cracks and uneven bumps on the bark. This phenomenon is most pronounced in birch trees. "You can see for yourselves," she said, pointing to the birch tree, that the bark on the south side of the birch tree is lighter than on the north side, and that it is more elastic. ”

"It's really yes!" Everyone looked at the birch tree and said.

"In summer, the trunks of pine, cypress, and cedar trees emit more glue from the south than from the north, and the clumps are larger. The secondary bark covered with pine trunks is formed earlier in the north than in the south, and the upward development is higher, and this phenomenon is more prominent when the bark swells and blackens after rain. In autumn, the south-facing side of the fruit tree has dense branches and leaves, and there are many fruits, especially apples, red dates, persimmons, hawthorns, lychees, citrus, etc. When the fruit is ripe, the south-facing side is dyed first. ”

"Because they're facing the sun." Zhao Shuangxi said with a smile.

"The ant's nest under the trees and near the bushes is always south of the trees and shrubs.

Mosses that grow on stones are damp and not tolerant to sunlight, so moss usually grows on the north side of stones.

In the mountains and hilly areas of northern China, dense arbor forests mostly grow on shady slopes, while shrub forests mostly grow on sunny slopes. This is due to the slow evaporation of water in shady slope soils and good soil and water conservation, so vegetation recovery is faster than that of sunny slopes, and forests are easy to form. In terms of tree habits, fir and spruce grow well on the north slope, while masson pine, Huashan pine, birch, poplar, etc. grow mostly on the south slope.

In spring, the first side of the snow melt faces south, and the side that melts later faces north. The pits and hollows are facing the sun in the north, and the snow melts earlier. Most of the rivers in the northern tundra are gentle on the north bank and steep on the south bank.

In addition, most of the temples, pagodas and general housing are located in the north and facing south. The doors of Islamic mosques face east, and worshippers face west. Hua Junyao chattered a lot.

"Jun Yao, do you know a lot?" Zhao Shuangxi looked at her with small eyes and said.

"Just read more books." Hua Junyao looked at Zhao Shuangxi and said, "A modern army needs knowledgeable soldiers. (To be continued.) )