Mineral oils are used to lubricate machinery.矿物油被用来润滑机器。Do not use emollients or oils to lubricate the skin.不要用润肤剂或油类来润滑皮肤。You should lubricate the wheels of your bicycle once a month.你应该每个月给自行车轮子加一次润滑油....
In drilling an oil well, mud is used to lubricate the cutting bit.钻油井时, 泥浆被用来润滑钻头.Lubricate adjuster screw threads and pivot with spray lube.使用喷雾润滑油润滑调整器螺丝螺纹和枢轴.You should lubricate the wheels of your bicycle once a mont...
The boy surrendered the catapult to the teacher.那孩子把弹弓交给了老师.He fitted a pebble into the catapult and pulled back the elastic. Twang!他把石子放进弹弓里，然后往回拉动橡皮筋。“嘣”！The sting of the catapult bullet had worn off.挨的那下弹弓不那么疼啦....