屡试不爽

屡试不爽lǚ shì bù shuǎng

1. 每次使用都有效；多次试验都不错。

   例这种新农药效果良好，屡试不爽。

   英be found officious as often as it is tried; be often tried and often succeeded; effective every time it is used;

屡试不爽lǚ shì bù shuǎng

1. 屡次试验，结果都相同。

   例如：「这个方法十分有效，屡试不爽。」