1 N-COUNT (标明相关信息的)小布条，小标签，小纸条 A tab is a small piece of cloth or paper that is attached to something, usually with information about that thing written on it. (标明相关信息的)小布条，小标签，小纸条
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A stupid medical clerk had slipped the wrong tab on his X-ray.
一个蠢笨的医护人员一不留神在他的X光片上贴错了标签。
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...a small red tab sewn on to the left-hand side of the back right pocket.
缝在右后口袋左边的一个小红布签
SYN flap, tag, label, ticket
2 N-COUNT (商品、服务的)总价钱，账单 A tab is the total cost of goods or services that you have to pay, or the bill or check for those goods or services. (商品、服务的)总价钱，账单 [mainly US]
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At least one estimate puts the total tab at $7 million.
至少有一个估价把总数定在了 700 万美元。
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'I'll get my purse out of the bedroom.' — 'No sweat, Mrs. Day. We can put it on your tab.'
“我去卧室拿钱包。”—“别费事了，戴夫人，我们就记在你的账单上好了。”
3 N-COUNT (易拉罐的)拉环 A tab is a metal strip that you pull off the top of a can of drink in order to open it. (易拉罐的)拉环
4 N-COUNT (尤指非法出售的)药片 A tab is a drug, especially one that is sold illegally, which is in tablet form. (尤指非法出售的)药片 [informal]
5 PHRASE 密切注意，严密监视(某人的一举一动) If someone keeps tabs on you, they make sure that they always know where you are and what you are doing, often in order to control you. 密切注意，严密监视(某人的一举一动) [informal]
6 PHRASE (替一群人)付账，承担费用 If you pick up the tab, you pay a bill on behalf of a group of people or provide the money that is needed for something. (替一群人)付账，承担费用 [informal]
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Pollard picked up the tab for dinner that night.
那天的晚饭是波拉德掏的钱。
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Today any employee with back or shoulder pain can go straight to Mr Jay and the company will pick up the tab.
现如今，不论哪位雇员的背部或肩膀疼，都可以直接去找杰伊先生，费用由公司承担。
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