Ssdna
[化] 单链DNA
🗣️ 情景例句
While it may be cold outside, it's always warm here in the office.
外面可能很冷的时候，办公室里面总是很暖和。
I'm afraid I won't be able to come.
我恐怕不能来。
He turned on the light, but he couldn't see anyone. The thieves had already gone.
他开了灯，但不见一个人。小偷逃走了。