屡试不爽

lǚshìbùshuǎng

put to repeated tests and proved right

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time-tested

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time-tested

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屡试不爽

lǚ shì bù shuǎng

have proved effective every time; As often as it is used, it proves accurate.; effective every time it is used; have stood numerous tests; have the same result or reaction after try; prove successful in every test; put to repeated tests and proved right; repeated tests have shown it to work well

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屢試不爽|屡试不爽 [lu shì bù shuǎng] ► well-tried ► time-tested