人们认为地壳分成了巨大的、可移动的部分，称为板块，这些板块漂浮在柔软可塑的岩石层上。
The Earth's crust is thought to be divided into huge, movable segments, called plates, which float on a soft plastic layer of rock.
‘银辉’的漂浮机器每秒可吸取10吨的水。
Silver Lining's floating machines can suck up ten tons of water per second.
可膨胀的PFD有较少的体积和没有了干扰泡沫单位，但在想不到的进入水后实时提供漂浮。
An inflatable PFD has less bulk and interference than a foam unit, but is ready to provide flotation during an unexpected entry into the water.
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