Ice floats on water because the density is less than that of water.
冰浮于水，因为其密度小于水的密度。
Whether an object will sink or float on water depends on its density.
物体在水上是沉是浮，这取决于它的比重。
Marine animals and plants take advantage of the density of water.
海生动植物利用了海水的密度。
The high energy density aluminum-water power system is especially suitable for underwater propulsion.
铝水推进系统具有能量密度高的优点，尤其适用于水下推进。
The high energy density aluminum-water power system is especially suitable for underwater propulsion.
铝水推进系统具有能量密度高的优点，尤其适用于水下推进。
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