医生建议，勤洗手是预防生病的最好办法，比如，可以防止伤风感冒以及远离食物内潜伏的细菌等。

Frequent hand washing is the single best thing people can doto avoid getting sick, from colds and the flu to germs lurking infood, doctors say.

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仅通过一个学期的大学课程，拖延的大学生的免疫系统明显受到威胁，会更容易出现伤风，感冒以及肠胃问题。

Just over the course of a single academic term, procrastinating college students had such evidence of compromised immune systems as more colds and flu, more gastrointestinal problems.

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干杯！一项新研究指出，在啤酒中发现的一种关键成分能有效对抗呼吸道病毒，啤酒可能有助于防治冬日感冒和伤风。

Cheers! A key ingredient found in beer, effective against a respiratory virus, may help ward off winter sniffles and cold, a new study suggests.

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