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海词积累1.acetylene n.乙炔2.hiss v.发嘶嘶声3.locomotive n.机车;火车头4.molten adj.熔融的5.swarmed v.蜂拥;涌动After Mom died,I began visiting Dad every morning before I went to work.He was weak and moved slowly,but he always had a glass of freshly squeezed orange juice on the k