no-brainer
noun [ S ] informal uk/ˌnəʊˈbreɪ.nər/ us/ˌnoʊˈbreɪ.nɚ/
不费脑筋之事;容易处理的问题
something such as a decision that is very easy or obvious
The decision was a complete no-brainer. 作这个决定完全不用多想。
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