Indispensible
不可或缺
🗣️ 情景例句
But I am going to make a headpiece of lace.
但我准备做一个蕾丝头饰。
I work hard all morning.
我整个早上努力工作。
What was the population of the more developed countries in 1950?
1950年较发达国家的人口是多少？