When they descend to 50 meters or deeper, they must return to the surface slowly, to allow their bodies to readjust to the lower surface pressure.是什么意思_When they descend to 50 meters or deeper, they must return to the surface slowly, to allow their bodies to readjust to the lower surface pressure.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句