Several men are pushing school desks and chairs into neat rows.几个人正挪动学校的桌椅，将它们排整齐。Empty soft-drink cans clutter the desks.空饮料罐胡乱地堆在桌上。There are not enough desks to go around in the classroom.教室里书桌不够用....
用合成纤维,像尼龙 、 多元酯 、 压克力或烯属烃.We use synthetic materials such as nylon, polyester, acrylic or olefin.烯属烃强韧抗湿气;压克力则又轻又抗日光.Olefin is strong and resists moisture while acrylic is light and can resist sunlight....