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1.G-LOC happens when the airplane is making a sharp turn or speeding up very quickly.
speed up 加速；使加速
You notice that your breathing has speeded up a bit.
你注意到你的呼吸已加快了一点。
I had already taken steps to speed up a solution to the problem.
我已经采取措施加快解决这个问题。
2.Passengers are always told before flying to put on the masks in case of a sudden loss of air pressure.
in case of 万一；如果发生；假设
She had had the foresight to prepare herself financially in case of an accident.
她有先见之明，经济上作了准备以防万一发生事故。
Put the bottle in a plastic bag in case of spillage.
把瓶子装在塑料袋里，以免洒得到处都是。
