降雪标志了一个锋面的到来，一个高压区似乎正在进入本地。
The snow signalled the arrival of a front, and a high-pressure area seemed to be settling in.
对任何管线和容器试压时，所有的井队职员都必须阔别高压区，直到试压结束。
When pressure testing any lines, vessels or assemblies, all rig personnel must be removed away to a safe area until pressure is released.
指出，当超音速飞行时，在前喷管附近的弹体表面上产生一个局部高压区，由此形成一个翻转力矩。
It is demonstrated that there exists a part of high pressure on the body surface of the rocket near the fore-located nozzles, thus forming a overturning moment.
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