绝大多数机械装置都需要用油作为润滑剂。Most mechanical devices require oil as a lubricant.这颜料得用油调和.The paint has to be mixed with oil.用油酥面皮盖住边缘，每层之间抹些熔化的黄油。Let the pastry overhang the rim and brush between the layers with the melted butter....

“用油”的英语可以翻译为：oil expenses...