Teenage boys clamber down mine shafts 30 to 50 meters deep.

孩子们沿着杆子爬到深30到50米的矿井里。

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It features reliable quartz movement and is rated water resistant to 50 meters.

它具有可靠的石英机芯，额定防水50米。

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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.

当他们潜到50米或更深之后，必须缓慢的回到水面，才能使他们的身体重新将压力调节到低一些的水面气压。

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It contains a device that measures such things as temperature, motion and light intensity, and it sports a miniature antenna and a radio with a range of 10 to 50 meters.

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Still, it feels solid enough for regular use, and thanks to waterproofing down to 50 meters (164 feet), it can stay on your wrist during laps in the pool (or in the ocean), and it'll work just fine in the shower as well.

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One glacier in northern Greenland was clocked going from 50 meters to 650 meters a year (about 160 feet to 2, 100 feet) over the course of seven years.

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