Preoptic
[医] 视叶前的
🗣️ 情景例句
I've been working too hard. I'm beat.
我工作的太多，我快垮了。
Sorry, sir. But it's our graduation day.
对不起，不过，今天是毕业的日子嘛。
If we could actually see the path described by a particle,such as a sand grain in the rock,
假如我们真能看到的运动轨迹，诸如岩石中一个沙粒分子