它的喷嘴抹了某种润滑油。Its nozzle was smeared with some kind of lubricant.天气冷时齿轮润滑油可能凝结而形成凹槽.Gear lubricants may congeal and channel in cold weather.这个月我们需要更多润滑油.We shall require more lubrication oil this month....
在花园里挖土的最好工具是铁锹.The best implement for digging a garden is a spade.她到处走, 又挖土,又锄草.She went from place to place, and dug and weeded.他的手掌因干挖土的活儿而磨破了皮.His palms were excoriated by the hard labor of shoveling....