各企业需要更好地培训工人，并且在研发方面加大投入。Businesses need to train their workers better, and spend more on R&D.该设备几个月之前曾投入运行。The device had been used operationally some months previously.他停下来，饶有兴趣地看着孩子如此投入。He stopped and watched with amu...
In the engine, oil is supplied to crankshaft and camshaft journals rotating in their supporting bearings.在发动机里, 机油被供应到旋转在其支承轴内的曲轴和凸轮轴轴颈上.The motion of the rotor can be balanced completely with rotating counterweights att...
For the first two or three days lochia is bloodstained and then becomes paler in color.在头2-3天,恶露深有血液,以后颜色变白.The killer must have been heavily bloodstained.凶手肯定身上血迹斑斑。...bloodstained clothing.染血的衣服Do you think they can li...