MEANING/意义
必要
EXAMPLES/列句
-
在必要的情况下
if necessary,under necessary circumstances -
没有必要把它说出去。
It's not necessary to speak it out.
COMBINATIONS/组合
-
必要性
necessity -
有必要
there is necessity, (it)  is necessary -
没必要
not necessary,no necessity -
必要条件
requirement,necessary condition (math)