他将两段金属丝溶接起来.He fused two pieces of wire together.消除产品表面溶接线, 溶接痕,波纹,银丝纹.Remove the welding wires and traces, ruffles and silver marks on product surfaces....
醇和醛两者为氧化的次级产物.Both the alcohols and aldehydes are secondary products of the oxidation.当次级电路开路时, 铁芯磁通量仅仅由初级电流产生.When the secondary circuit is open, the core flux is produced by the primary current only.群系可以按其优势物种的特征划分为一些次...
这枚胸针的历史可以追溯到公元前4世纪。The brooch dates back to the fourth century BC.落日余晖照射在她的胸针上.Her brooch caught the rays of the setting sun.她戴着一枚银质的小胸针.She was wearing a small silver brooch....