B2a device consisting of two rows of metal or plastic teeth-like parts that are brought together by pulling a small sliding piece over them, used for closing openings in clothing, bags, etc.拉链,拉锁
to pull a zipper up/down拉上/拉开拉链
I can't open my bag - the zipper is stuck.我的包打不开——拉链卡住了。
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