⒈ 每次使用都有效;多次试验都不错。KbE心趣莱学习网
例这种新农药效果良好,屡试不爽。KbE心趣莱学习网
英be found officious as often as it is tried; be often tried and often succeeded; effective every time it is used;KbE心趣莱学习网
⒈ 屡次试验,结果都相同。KbE心趣莱学习网
例如:「这个方法十分有效,屡试不爽。」KbE心趣莱学习网