One of the surprising findings from the new study, published Monday in the journal Archives of Internal Medicine, was just how little it took to knock down defenses against the common cold.
新研究中一项令人吃惊的发现，发表在周一的《内科医学档案杂志》， 即睡眠不足会让感冒抵抗力降到很低。
Happiness is to come home and knock on the door, rather than reach out and touch the cold key.
幸福是回到家后敲门，而不是伸手去摸那冰冷的钥匙。
Northerner answers: "North is cold rise, piddle should take a club, scatter freeze, follow along with aspic knock, otherwise person and wall want aspic to be in one place."
北方人答道：“北方冷起来，撒尿要带棒棒，一撒就冻，随冻随敲，不然人与墙要冻在一处。”
It drew strength from the not so-young people who braved the bitter cold and scorching heat to knock on doors of perfect strangers.
力量来自不是很年轻的人，他们冒着严寒酷暑，敲开陌生人的家门进行宣传。
It drew strength from the not so-young people who braved the bitter cold and scorching heat to knock on doors of perfect strangers.
力量来自不是很年轻的人，他们冒着严寒酷暑，敲开陌生人的家门进行宣传。
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