你也许会认为自己无用、不称职、应该受到指责。You may see yourself as useless, incompetent and blameworthy.尽量避免无用的重复劳动。Try to avoid wasteful duplication of effort.一轮无用的会议an otiose round of meetings...
那孩子缺钙.The child has a calcium deficiency.缺钙会危及到银屑病患者的身体健康.Calcium would endanger the health of patients with psoriasis.孩子缺钙可能会导致生长缓慢.Children may grow slowly with the absence of calcium....
广泛用于电流跨接线路及抗干扰场合.Widely used in interference suppression circuit.让我用跨接线帮你发动起来吧.Let me help you jump start it.(你可以用我的跨接线. )You can borrow my jumper cables....