Population ageing seems to be becoming a new problem.

The most obvious problem seems to be Japan.

Mr. Cao also used Japan as an example to explain the aging of the population.

However, from Yuan Li's speech, we can feel the seriousness of Japan's aging population.

Yuan Li said in class: "The last time I traveled to Japan, I met 8 drivers along the way, all of whom started at the age of 70, and they were afraid to take a taxi. My mom said, 'I'll never come to this place again, it's all this old driver, I'm really afraid of driving problems.'" ’”

Naturally, when everyone heard this, a picture of silver-haired Japan immediately came to mind.

Biology talks about bacteria and fungi.

However, the prions mentioned in the textbook are not so easy to understand.

After all, all other organisms are related to genetic material DNA and RNA, but prions can replicate only with specially folded proteins.

Judging by the data, a series of falsely copied proteins is enough to devastate the nervous system of mammals.

So, Wu Zhen spent a few days on the Internet at noon, searching for related content.

However, neither Tianya Forum nor the emerging Baidu Tieba can find a very reliable answer.

The answer I found was either describing prions as terrifying as "Dili Demon", or completely made up out of thin air, or the content was not well understood. (Note: It's 2007.) At that time, there was no Zhihu, no husk. ）

It seems that among the many "eloquent" netizens, there is no real cow who can explain prions clearly.

However, in the process of asking Mr. Hu after class, I got a partial answer.

Wu Zhenzhen asked, "What exactly is a prion?" ”

Teacher Hu smiled and said, "Haha, there is no very standard answer to this for the time being. Moreover, it is not easy to say whether it is a creature or not. ”

In this way, Wu Zhenzhen realized that the research on prions was not completed, so he could not get a completely standard answer.

That's why the answers on the Internet are so strange that we can't find more reasonable answers.

So, Wu Zhen silently made a wish, hoping to fully understand the knowledge related to prions in the future.

Then two short essays by the science fiction writer Asimov appeared in the language book.

Most of the students greatly broadened their horizons under Mr. Li's explanation.

The article "Dinosaurs Are Everywhere" is very easy to understand in connection with the continental drift that I learned in the first semester.

However, the drift of the continents seems to have been going on all the time, after all, the earth's crust is constantly moving.

And this also seems to give an alternative way to solve the problem.

After all, according to Asimov, it does seem very troublesome to directly study why there were similar dinosaurs on every continent.

However, when combined with the movement of the earth's crust, it becomes easy to understand.

Similarly, the direct study of how humans of African origin arrived in the Americas is difficult to understand.

However, as glacier research progressed, it was eventually discovered that the Bering Strait was connected a few years ago, so that people at that time were indeed likely to have traveled anywhere from Africa.

In addition, it is easy to understand that there are descriptions similar to the mountains and rivers of the Americas in the Classic of Mountains and Seas.

The latter article, "Crushed Sand", explains the meteorite impact of the Yucatan Peninsula 65 million years ago.

The meteorite fell from the sky under the gravitational pull of the earth and "flattened" the ordinary quartz sand with a very terrible impact, forming a highly dense allotrope of quartz - Si quartz.

Undoubtedly, these two articles have opened a new door for everyone at once.

The combination of knowledge and imagination seems to be able to burst out a lot of new things.

Many things seem to have to be open to the mind to find a new direction.

Suddenly, Wu Zhen found that it seemed that he hadn't bought "Science Fiction World" for a while.

So, when he walked to the magazine, Wu Zhenzhen resolutely took out the little money left and picked up the new issue of "Science Fiction World".

When he returned home and read the magazine of "Science Fiction World", Wu Zhenzhen seemed very happy.

Wow, why can't I think of these ideas?

How will people live in the future?

Geography books say that many of the resources that have been explored can only be used for a limited time, so what should we do when they are used up?

Wu Zhen found that watching sci-fi was more comfortable than playing crude computer games.

After all, the modeling of games such as "Dragon Babu" is still very jagged at this time.

And watching science fiction can have unlimited imagination.

Drinking milk and looking at the starry sky every day before going to bed, Wu Zhen looked so satisfied.

However, the number of pages in the magazine is limited after all, and with the last story of this issue read, Wu Zhenzhen broke away from this state again.

It seems that in this way, the learning efficiency is much higher, and even the English homework is willing to use the brain occasionally.

In the face of long and difficult sentences in English, it is no longer blindly resistant, and the dictionary and the Internet have also been used by Wu Zhen.

In fact, this state change is also natural.

After all, English is still very important in exams.

More than a year later, English accounted for 120 points in the high school entrance examination, and 150 points in the college entrance examination four years later.

So over time, it is no longer completely negative and ignored.

After all, you can't ignore a wall in front of you.

However, there doesn't seem to be a good way to do it.

After spending a lot of time, there was no noticeable improvement in these English exercises.

A little long word of a dozen letters can make an otherwise simple sentence very difficult to understand.

Wu Zhenzhen found that even if he had worked hard, this thing was still relatively difficult to complete.

Every day at noon, turning on the computer and looking at the experience of those "successful" people, it is difficult for Wu Zhenzhen to sum up any methods.

After all, people who brag about not making drafts can go from Haikou to Mohe.

However, there are still valuable answers, but they are not easy to identify. It is indeed difficult to have eyes that find beauty.

However, after reading a lot of this kind of experience, I can find a commonality, the most important point of this English learning is accumulation.

As the saying goes, "perseverance, gold and stone can be carved." ”

Only by persistently reading texts and memorizing words for a long time can it be possible to make a real improvement in English proficiency.

And, in the beginning, this improvement will seem very weak, very slow, so slow that you don't even feel like you're improving.

They may even doubt themselves because of the slow progress.

However, it is also a process that must be experienced.

After all, "the nine-story platform starts from the soil." ”

Therefore, even if it is difficult, Wu Zhenzhen will continue to work hard to learn English, after all, there are indeed too many countries and regions in the world that use English.