在回到水面后，他们必须花上在50米的水下相等的时间来减压。
When coming up to the surface, they must spend as much time decompressing as they spent under 50 meters of water.
鱼类从被捕获开始到带上水面所需要的减压时间不尽相同。
The decompression time between catching and bringing fish to the surface differs among species.
我是荷兰陆军一名潜水医学军官，专业潜水中会在水面用氧气来进行快速减压。
I am a diving medical officer of the Dutch army. One of the methods of professional diving is with surface decompression, using oxygen for a faster decompression.
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