Indespensability
n. 不可少, 必需
🗣️ 情景例句
Don't talk so loud, you may be overheard.
别这么大声说话，别人会听见的。
Even Homer sometimes nods.
人非圣贤，孰能无过。
Yes, Miss Zhao. answered the students. Now, who is on duty today?
“好的，赵小姐，”同学们回答。“今天谁值日？”