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。
For natural circulation, it is shown that parallel flow in the tubes of vertically inverted U-tube team generator (UTSG) can be non-uniform, and reverse flow occurs within some tubes.
自然循环条件下，立式倒u型管蒸汽发生器(UTSG)并联倒u型传热管内存在非均匀流动，部分传热管出现倒流。
Besides, a notable vortex rope and a reverse flow structure exist in the draft tube in smaller wicket gate openings, which can easily lead to the instability in operation of the pump-turbine.
此外，发现开度较小时尾水管内存在明显的涡带和回流涡结构，容易导致机组运行的不稳定；
Besides, a notable vortex rope and a reverse flow structure exist in the draft tube in smaller wicket gate openings, which can easily lead to the instability in operation of the pump-turbine.
此外，发现开度较小时尾水管内存在明显的涡带和回流涡结构，容易导致机组运行的不稳定；
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