She stifled another yawn and tried hard to look interested.
她又忍住了哈欠，竭力显出感兴趣的样子。
We see another yawn, and our impulse is to follow suit.
当我们看到别人打哈欠的时候，我们也会跟着打哈欠。
During tests, researchers found that while men and women yawn spontaneously at equal rates, women are more likely to yawn in 'reply' to another person's yawn.
在测试过程中，研究人员发现，相同频率下，男人和女人自发地打哈欠时，女性更可能会受他人影响打哈欠。
During tests, researchers found that while men and women yawn spontaneously at equal rates, women are more likely to yawn in 'reply' to another person's yawn.
在测试过程中，研究人员发现，相同频率下，男人和女人自发地打哈欠时，女性更可能会受他人影响打哈欠。
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