Once its impurities had settled, the oil could be graded.一旦杂质沉淀下去，油就可以定级了。
settle用不及物动词造句
V-T/V-I If something settles or if you settle it, it sinks slowly down and becomes still. 使沉降; 沉降
A black dust settled on the walls.
一团黑色粉尘落到了这些墙上。
Once its impurities had settled, the oil could be graded.
一旦杂质沉淀下去，油就可以定级了。2015-03-09
及物动词
they
agreed
to
try
to
settle
their
dispute
by
negotiation
他们同意通过谈判来努力解决纠纷。2019-02-15
