2. 外语
  3. The accuracy of scientific observations and calculations is always at the mercy of the scientist’s timekeeping methods. For this

The accuracy of scientific observations and calculations is always at the mercy of the scientist’s timekeeping methods. For this

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问题 The accuracy of scientific observations and calculations is always at the mercy of the scientist’s timekeeping methods. For this cause, scientists are interested in devices that give promise of more precise timekeeping.
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答案cause reason
解析 cause着重指产生或造成某事发生的原因，往往指造成不好的影响。如：The cause of the accident was his carelessness．故不宜用在此处。reason着重指解释或说明某事发生的理由或原因，如：The reason for which he was late was that he got up late．
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