necessity
/nəˈsɛsəti/
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n. 必需品；必要性
- A smartphone has become a necessity for many people who work from home. 對很多在家工作的人來說，智慧型手機已經成了必需品。
其他意思
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n. 必要, 必需品
The necessity of something is the fact that it must happen or exist.
- There is agreement on the necessity of reforms
也出現在：
字根
cede, ceed, cess, ced, ceas, cest 走；讓步
ne + cess + ity不 + 讓步 + 名詞