动词 jacket:

1. provide with a thermally non-conducting cover

2. put a jacket on

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1. The protective plastic jacket consists mainly of polyurethane.
   现在给瓶子包上一层用聚安酯制成的外套。
2. It's hot today, I think I'll leave my jacket off.
   今天挺热的，我今天不穿外套了。