On the surface that didn't seem to make sense — why would people give less blood when given money for their trouble?

表面上这似乎没有什么关联性——人们为什么在获得金钱的时候减少献血量呢？

youdao

Now, I'd better make the surface of my water a straight line, otherwise I'm going to get in trouble.

这里我最好把水面画成直线，否则会有一点小麻烦。

youdao

Now, I'd better make the surface of my water a straight line, otherwise I'm going to get in trouble.

这里我最好把水面画成直线，否则会有一点小麻烦。

youdao