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1·People who thought it was a sign of a healthy heart to hold their arms underwater for longer did just that, while those who believed the reverse all of a sudden couldn't take the cold.

那些认为能够长时间忍耐冷水则说明拥有健康心脏的人能在水中浸泡更长时间，而那些具有相反认识的人突然不能忍受冷水了。这看起来不错，不过那些人确实进行了自我欺骗吗？

2·The waveform of the reverse voltage across the bridge arms and the harmonic contents are analysed.

本文分析了整流器在不同换流重叠角时的桥臂反压波形及谐波分量。

3·The superpowers are putting the arms race into reverse.

超级大国正在把军备竞赛转换成相继裁军。

4·Isochromosome — an abnormal chromosome in which one arm is duplicated (forming two arms of equal length, with the same loci in reverse sequence) and the other arm is missing.

着丝粒在染色体中间，两臂等长的染色体。