“分级”造句

一旦杂质沉淀下去，油就可以分级了。
Once its impurities had settled, the oil could be graded.

将在统一费用和分级费用之间作出选择。
The choice will be between a flat-rate or a banded charge.

木材按厚度分级.
The timber is graded according to its thickness.

• #分级