Haematachometer
血流速度计
🗣️ 情景例句
I have the whole summer ...
我有一整个暑假可以利用……
Politeness is to do and say the kindest thing in the kindest way.
文雅就是善良地做事，和善地说话。
People are always talking about 'the problem of youth'.
人们总是在谈论“青年问题”。