He slogged ( on ) through the mud.他 吃力 地在泥泞中跋涉.We slogged through the mud of an early spring thaw.我们在初春解冻时节的泥泞中艰难行进。She has slogged her way through ballet classes since the age of six...从 6 岁开始，她就一直在努力地学习芭蕾。He slogged aw...
这钻机有变速控制。The drill has variable speed control.他发明了新的钻机之后, 许多荣耀都加在他的身上了.After he invented the new drilling machine, honors were thrust upon him.这种钻机的位置是锚定的.The rig is moored in position....
阀盘结构为空气垫型膜式阀盘.The valve plate is made of air gasket type valve plate.野营的饭食不是大问题,床也不是. 多亏了空气垫和睡袋.Camp meals are no great problem. Neither are beds, thanks to air mattresses and sleeping bags....