Quarternary structure
[化] 四级结构
🧩 词语组成解析
[计] 四元的
🗣️ 情景例句
I don't know if I can get to sleep.
我不知道我能否睡得着。
What do you think of my children?
你认为我的孩子怎么样？
Since then, they have been trying to find out how the fire began.
从那时起，他们一直试图找出起火的原因。