⒈ 每次使用都有效;多次試驗(yàn)都不錯。
例這種新農(nóng)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;
⒈ 屢次試驗(yàn),結(jié)果都相同。
例如:「這個方法十分有效,屢試不爽。」
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