如果小球是用松散的泥土做成，它的分量就小一些；如果是用石头，就会重一些；如果用的是金属材料，那么它就会更重，其重量取决于所用金属的质量。
If made of loose earth, it will weigh little; if stones are taken with it, it will weigh more; while, if metals were put in, it would, according to the kind of metal you take, weigh still more.
堆积密度是指每单位重量的体积松散倾斜燃料。
Bulk density is defined as the weight per unit volume of loosely tipped fuel.
应用推荐