Pheromones are odorless chemical compounds emitted not only by men, but also by women — and a host of animals and insects.

信息素是一种没有气味的化合物。不仅男人和女人，很多动物和昆虫都会散发这种气味。

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Lions and tigers only kill and eat men when they have grown too old and too weak to catch their usual food, such as deer and other small animals.

只有当狮子和老虎年老体衰到不能捕捉到像鹿和其他小动物这些日常食物时，它们才会咬死并吃掉人。

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