Indespensability
n. 不可少, 必需
🗣️ 情景例句
I'm going to use it for business.
我会在业务上用到它。
Would you please tell Mr. Cooper that I'm here.
请您告诉库珀先生我在这里。
'We're going back now,' said the conductor.
“我们现在要返回去，”售票员说。