a semisolid mixture of hydrocarbons obtained from petroleum; used in medicinal ointments and for lubrication
例句
用作名词 (n.)
Apply a thin coating of petroleum jelly or chassis grease to the exposed surfaces of the cable terminal clamps and the battery terminal posts. 为电缆终端线夹和电池接线柱露出部分涂一层薄的凡士林油或车用底盘滑脂。
美
