重量每卷：吨立方码，磅每立方码，和公斤每立方米。
Weight per Volume: Tons per Cubic Yard, Pounds per Cubic Yard, and Kilograms per Cubic Meter.
在一个实例中，科学家们发现大量立方码的沙粒从沙丘的表面崩落。
In one instance, scientists found that hundreds of cubic yards of sand had avalanched down the face of a dune.
典型的单位是挖方或混凝土工程的立方码和布局钢的吨位。
Typical units are cubic yards for excavation or concrete work and tons for structural steel.
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