Shrinkage and dispersed shrinkage are the special waster of ductile iron.缩孔和缩松是球墨铸铁特有的废品现象.The metallocene is summarized as strata, lithology, structure, and especially brittle - ductile shear zone.该区金矿的控矿条件为地层岩性和构造, 特别是...
售票员慵懒地拖着脚走向下一节车厢。The conductor shambled to the next carriage.售票员吹哨子, 电车停了下来.The conductor blew his whistle, and the tram stopped.告诉售票员在奥汀提醒你下车.Ask the conductor to put you off at the Odeon....