Fluids
n. 液体；流体（fluid的复数形式）
🗣️ 情景例句
Will you be so kind as to help me out of the difficulty?
帮助我克服困难，好吗？
I'm always disappointed when I don't get any mail.
当我收不到任何邮件时，我总是很失望。
The Hubble telescope was launched into space by NASA on April 20,1990 at a cost of over a billion dollars.
哈勃望远镜于1990年4月20日由国家航空航天局发射升空，耗资10多亿美元。