我做挤压管生意。I work in the extruded tube business.盛怒之下, 他用膝盖挤压那人的肚子.In anger, he ground his knee into the man's stomach.塑料从细孔中挤压出来形成纤维.Plastic material is extruded through very small holes to form fibres....
We tried to grow some copper sulphate crystals with our children.我们想跟孩子们一起制作硫酸铜晶体。El Salvador produces 100,000 tons of refined copper annually.萨尔瓦多每年生产10万吨纯铜。He makes decorative vessels in copper, stainless steel and sil...