石油产品的色泽: color shade of petroleum productcolor shade of petroteum product
澄清: 澄清1.(清亮) clear; transparent 短语和例子湖水碧绿澄清。 the water of the lake is green and clear.2.(弄清楚) clear up; clarify 短语和例子澄清事实 clarify some facts; 澄清误会 clear up a misunderstanding; 要求澄清 demand clar