The average human produces 25, 000 quarts of spit in a lifetime, enough to fill two swimming pools.

普通人一生中产生25 000夸脱的唾液，足以填满两个游泳池。

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AIM: To observe the changes of physiological and endocrine indexes in swimming athletes and non-athletes under coldness and hotness and their influence on human immune system.

目的：观察冷、热环境下游泳运动员和非运动员生理和内分泌指标的变化，以及这些变化对人体免疫系统的影响。

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You're swimming upstream against human nature.

你在逆流而上，而你逆反的就是人性。

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In June, the environment secretary, Victor Ramos, announced that the island's waters were unsafe for swimming due to high levels of coliform bacteria, which is usually associated with human sewage.

ECONOMIST: The island that became too popular

Tilikum has spent more than a quarter of a century swimming in circles, in a space that critics say would be equivalent to keeping a human being in a bathtub.

CNN: Free the killer whale