他穿着高及膝盖的皮护腿,留着海象般的八字胡,真是个古怪的老家伙.He is the queer old duck with the knee - length gaiters and walrus mustache.海象的外形是从海牛物种里演化而成.The shape of Walrus evolved out of the Manatee species.那只老海象慢慢地转过头来,睁开了眼睛.The old walrus turned...
' steel in this class is tough, ductile and easily machined. "这种钢强韧, 延展性好,而且容易加工.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 metal is very hard and strong and less ...