Fluids
n. 液体；流体（fluid的复数形式）
🗣️ 情景例句
Then an adult must sign for you.
那就必须有一位成年人来替你签字。
Let me carry your baggage.
让我拿你的行李。
He had been obliged to join the army during the Second World War.
年龄比他两个弟弟大很多，第二次世界大战期间被迫参军。