1. Crowds of people plodded around in yellow plastic raincoats. 一群群身穿黄色塑料雨衣的人在四下里吃力地走着。
2. They're all wearing raincoats. 他们都穿着雨衣。
3. I was going to say "raincoats", but the forecast has changed so you can leave those at home. 我本来想说“雨衣”,但是天气预报变了,所以你可以把雨衣留在家里。
4. Before you set out, always get warm clothes and raincoats ready, just in case! Even experienced travelers get lost. 出发前,一定要准备好暖和的衣服和雨衣,以防万一!即使是有经验的旅行者也会迷路。