You can't reverse all your past exposure, but you can prevent future damage: Wear protective clothing (like long sleeves) and get your tan from a tube, not a tanning bed!
不能改变以往被晒的事实，但是你可以防止今后的伤害：穿保护衣物(如长袖衣服)，通过管子把皮肤变成古铜色，而非晒太阳床。
In DE bottom of the concrete caisson lies a heat exchanger, a liquid filled winding tube, like a reverse underfloor heating system.
在混凝土沉箱的底部装置有一个热交换器，交换器内是充满液体的缠绕管，就像反向地暖系统。
In addition, the effect of the reverse circulation in a bayonet tube type waste heat boiler on the safe operation of the apparatus is also discussed.
此外，本文还从工质流动特性上讨论了刺刀管式废热锅炉发生逆循环对于设备安全运行的影响。
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