Indespensability
n. 不可少, 必需
🗣️ 情景例句
Workers have to work very hard to keep bread on the table.
工人得十分努力工作才能赚钱糊口。
Don't forget to write your return address on the letter.
不要忘记在信封上写你的回邮地址。
So I will receive and sign it overnight.
那么，我明天就可以收到并且签上名了。