Necessary
定义
(形容词) 为特定目的所需
例句
“Water is necessary for all living things.”
“A valid ID is necessary at the gate.”
进门时需要有效身份证件。
“We decided the extra meeting wasn't necessary.”
我们觉得没必要再开那场会。
“Necessary tools are in the blue box.”
必要的工具都在蓝色盒子里。
“If you want the refund, a receipt is necessary.”
如果你想退款,就得有收据。
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