Indispensability
出国 Abroadn. 不可缺少, 责无旁贷
✅ 同义词
🗣️ 情景例句
I've got to explain about it.
我得解释一下此事。
You are very justified in your answer.
你的答辩使你的行为的正当性深受认可。
deprived of one of the greatest twentieth-century opportunities.
被剥夺了20世纪最优越的机会之一。