Indispensability
出国 Abroadn. 不可缺少, 责无旁贷
✅ 同义词
🗣️ 情景例句
He's something!
他真了不起！
I want to purchase some computers from your company.
我想从贵公司购买一些电脑。
What was the conference like?
这个会议怎么样？