bathe: You bathe something to make it clean in a medical way. bath: You bath to get clean.
这组词都有“油”的意思,其区别是: fat: 多指动物性脂肪,常为固态。 grease: 通常指经加热变柔软的油脂。 oil: 泛指植物、动物和矿物性液体油。