屢試不爽

詞語解釋

屢試不爽[ lǚ shì bù shuǎng ]

⒈  每次使用都有效；多次試驗都不錯。

例這種新農藥效果良好，屢試不爽。

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

國語辭典

屢試不爽[ lǚ shì bù shuǎng ]

⒈  屢次試驗，結果都相同。

例如：「這個方法十分有效，屢試不爽?！?/span>