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有道翻译

has been studied before

已经被研究过了

以上为机器翻译结果,长、整句建议使用 人工翻译

双语例句权威例句

  • While male contraception has been studied before, no method met the stringent safety and effectiveness criteria that female methods do. It was also unclear whether men would use them.

    关于男性避孕已经早有研究但还没发现一种比女性避孕术更安全有效方法而且,尚不能确定男性是否愿意使用这些方法。

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  • Based on a numerical model cesium atomic clock designed before, the influence of atomic velocity distribution consisting of two peaks and three peaks has been studied respectively.

    基于建立的小型原子钟计算机模型系统,研究了铯束原子速度双峰分布分布原子钟微波频谱的影响

    youdao

  • The hydrogeology condition of coalfield has been studied deeply according to the research findings done before and field works, as well as the analysis and rearrangement for the collected data.

    已有研究成果基础上,借助野外现场调研室内资料的分析、整理,深入了解了煤田区的水文地质条什。

    youdao

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