grease、fat与oil这些名词均有“油”之意。
grease : 通常指经加热变柔软的油脂。
- The dinner plates were thick with grease.
餐盘上厚厚一层油。 - You'll have to put some grease on those ball bearings.
你得往滚珠轴承上涂些油。
fat : 多指动物性脂肪，常为固态。
- body fat
身体脂肪 - Women have a layer of subcutaneous fat (= fat under the skin), which provides them with better insulation than men.
女性有一层皮下脂肪，使她们比男性更耐寒。
oil : 泛指植物、动物和矿物性液体油。
- drilling for oil
钻探石油 - the oil industry
石油工业 - diesel/lubricating oil
柴油／润滑油 - olive/corn/vegetable/sunflower oil
橄榄／玉米／植物／葵花籽油
