"Gametes refer to the mature sex cells produced by the reproductive system when organisms undergo sexual reproduction, referred to as germ cells...."

In the ears, there is a voice like a heavenly sound, and the tip of the nose is surrounded by the unique body fragrance of the girl.

My sister Ling and I were studying in bed.

It's nice to have a capable sister.

This is my current feeling, pre-exam review, without Ling's help, it is not possible.

DNA replication and recombination, which originally sounded boring, became a lot more interesting under Ling's explanation, and because there was a beautiful girl next to me, I was unexpectedly easy to concentrate.

"Hey.... Perverts, don't get distracted. ”

Just as I was thinking about it a little distractedly, Ling knocked me.

"Oh, I'm sorry, I just thought it was nice to have you around."

I said slowly to my sister.

She paused slightly at my words, then stopped looking at me, her slender fingers turning the pages again.

"Hurry up and learn.... Rhetorical guys...."

My sister's face flushed, and she urged me dissatisfiedly.

"Uh... Good. ”

I promised, alas, this is my sincere words, it is great to have such a capable sister by my side, and when I have any doubts and difficulties, I can ask her for advice.

"There's one last part of the concept that I'm going to talk about for you — and I'm going to talk about the difference between RNA and DNA."

Ling flipped through the thick biology book and found a huge single spire, on which a lot of disgusting lumpy proteins were congealed, and I knew that this should be RNA.

"The main differences between RNA and DNA are morphological and functional.... DNA is a double helix......"

My sister explained carefully little by little

- "Do you understand everything?" God ....."

When she was done, she turned her face sideways and looked at me and asked.

"Uh-huh, I got it."

I nodded and said, the whole knowledge about reproduction and heredity now feels very clear.

"Okay, I'll check you later, before that, let's practice the vocabulary."

"The word... Good. ”

I took on my sister's next training.

Because it is an international department, the American courses are taught in English, and if you don't understand some words and pronunciation, you won't be able to understand the class.....

"Let's get to know these words first, God, I've sorted them out for you, there are forty words in this unit, and I can memorize them in five minutes."

Ling handed me a small notebook, which was filled with forty words in Junxiu font, and there were Chinese definitions and phonetic transcriptions next to it.

"Well, I can't memorize it in five minutes....."

"Try your best to know, you can know the meaning of Chinese when you see it."

"Okay, give it a try."

I said, and then I seriously held my breath and looked at the words as my sister watched me.

I can't live up to Ling's expectations, and I finally sorted out so many words.

Thinking like this, my brain's thinking gradually accelerated, and every word was clearly reflected in my eyes, and I quickly memorized it......

"It's five minutes up."

Ling said, I handed her the word book, and I memorized the Chinese meaning of more than 30 English words, and it was already my limit to be able to do it so quickly.

"Alright.... So what else is there to learn. ”

I asked my sweet sister tutor.

"Let's practice vocalization....."

"Vocal exercises... Good. ”

Another task assigned to me by Ling is to practice vocalization.

"Turn off the lights."

Just as I was looking at the phonetic transcription of the word and thinking about how to pronounce it, Ling gave further instructions.

Turn off the lights?

Ling Hong's lips said lightly.

"Uh, why do you want to turn off the lights when you do vocal exercises?"

I asked her, confused.

"It is said that darkness strengthens people's imagination and memory, so well.... Let's turn off the lights and practice. ”

Ling explained, yes, that's right, I do feel that in the dark, my mind will become more active.

"Okay."

I nodded, and climbed to the head of Ling's bed.

"I'm turning off the lights."

"Hmm."

Ling nodded, then I raised my hand and pressed the button on the head of the bed, and the lights that lit up the surroundings went out, and my vision was shrouded in darkness.

It is said that when the vision is dark, if you close your eyes slightly for more than ten seconds and then open them, you can see some things around you clearly.

I slowly closed my eyes, and suddenly I felt that my hearing had become much more sensitive, and I could feel the sound of my own heartbeat and the sound of my breathing.

"Alright.... Let's start vocal exercises. ”

Ling also paused for a moment, and then said to me.

I opened my eyes, and everything around me was no longer so dark, and I could see the shallow outlines around me, and Ling's pretty face half hidden in the darkness.

"Well, let's start, I'll read it again, God, you read it again."

My sister and I faced each other in the dark, and she said to me slowly.

"Okay.... But Ling, can you remember it if you don't look at it? ”

"Remember."

She said, this memory is really strong, and she can read the words directly.

"Reproduction."

Ling made a very standard British pronunciation.

“Reproduction"

I read it along, but I couldn't read the graceful feeling of Ling.

"Again, read it slower—Reproduction."

Ling instructed.

“Reproduction."

I tried hard and read it again with caution.

"Gamete—Gamete."

“Gamete."

"I feel like my brother didn't pay enough attention to the phonetic transcription of [u] and [a]."

"Well, it's not easy to pronounce the phonetic ...... of these two phonetic transcriptions."

"I'll teach you."

"Hmm."

Ling said carefully, did you start to teach me the sound of each phonetic alphabet step by step? ”

"a——(pronounced the same as "ah——")"

Ling whispered.

“a——“

I also sent a sound, so it's okay.

"Not good enough.... God, you push harder, a-"

Ling instructed me, and I coughed lightly twice and continued to make noise.

“a——“

That should be the case.

"u" (Chinese pronunciation is the same as "woo...."——"

“u——”

"Alright, almost, come on continuous....."

"Hmm."

“a——a——a——”

“u——u——u——“

"God.... (voices) come out of it... Fast... a——”

"Hmm... u——"

..........

[Outside Ling's room, Granny Wang, who was cleaning, stopped.

She blushed and listened intently to the movement coming from Ling's room:

"God... Push harder, ah...."

"Ahh

"Uhhh

"Uhhh

"Alright, it's almost, come on continuous...."

"Hmm."

"Ahh Yes... Yes! ”

"Woo... Woo... Woo. ”

"God.... Come out of it... Fast... Ahh

"Hmm... Woo-"

......

Granny Wang had been listening to the movement in the room awkwardly, and went downstairs silently.

"It turns out that the little god and his sister have this relationship?"

She asked to herself, stunned, before she could react.

"Alas.... Parents are not at home, young people's desires are really terrible....."

Granny Wang put down her broom and said with a lament. 】