留美老師帶你每日說英文第848期:一天要喝八杯水有科學依據嗎?

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臺灣籍旅美老師今天交給我們的句子是：

We're often told to drink around 8 glasses of water a day to stay healthy, but the honest truth is that this specific number is somewhat j..com/tags-6304-0.html" target="_blank" >arbitrary, and no scientific research exists to support it.
我們常聽到：人一天要喝八杯水來保持健康。但事實上，這個喝水的量是沒有根據的；現有的科學研究也無法證實此論點。