达尼在那里堆雪人.Dani's making a snowman.我们去堆雪人,但还未堆完一半时,我已感到寒气刺骨了.We went to build a snowman but before it was half finished I was chilled to the bone.我和我最好的朋友在这里堆雪人打雪仗.My best friends and I made snowmen and had snowball f...
三种最主要的品种是温石棉, 青石棉和铁石棉.The three most important varieties are chrysotile, crocidolite and amosite.强度按青石棉,温石棉, 铁石棉顺序下降.The strengths decrease in order crocidolite chrysotile, amosite....