Scientists assign a magnitude rating to earthquakes based on the strength and duration of their seismic waves.

科学家根据地震波的强度和持续时间把地震强度分为了不同的等级。

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As each was graded on their overall performance, five 'handshake raters' also marked them on their grip, strength, duration, vigour and eye contact.

研究人员不仅对每个大学生的整体表现打分，还有五个“握手评分者”对他们的握法、力量、持续时间、活力和眼神交流进行打分。

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Cooper would joke to friends and colleagues that the calls from that phone would have to be short in duration: Who had the strength to hold it to an ear for very long?

库伯经常跟朋友或同事开玩笑说打电话的时间要缩短，谁有力气把手机放耳朵旁很久？

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