如题所述
A plastic bag was floating in the water.
一个塑料袋在水中漂浮。
Put the bottle in a plastic bag in case of spillage.
把瓶子装在塑料袋里,以免洒得到处都是。
How should I know where you've left your bag?
我怎么知道你把包丢在哪儿了?