Word Network: 必不可少的
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Related Words (4)
前提
A thing that is required as a prior condition for something else to happen or exist; a premise in an argument.
B1必要性
Necessity; the fact of being required or indispensable.
A2要素
A fundamental part or feature of something, especially one that is essential for its success or function.
B1必须
must, have to
A1
