乘坐飞机时，盛装物品的透明塑料袋是自备还是机场提供呢？ 货物放进塑料袋,英文怎么说?

首先把货物放进2层的塑料袋中，然后装入纸板桶里. First placeputlay the goods into the two-layer plastic bags，and then into the cardboard barrels...