plastic dye laser

例句：

1. 1.The new car is made of plastic.
   这辆新车是用塑料做的。
2. 2. Plastic bags are often usedto wrap food.
   塑料袋通常用来包裹食物。
3. 3. The plastic bag was soheavy that it almost broke when I liftedit.
   这个塑料袋很重，我一提它就破了。