• 1. back-number: 过期的
• 2. back number: 过期的杂志 | 过期刊物
• 3. a back number: 过期书刊 | 过期报纸

更多释义

• 1.After a number of mishaps she did manage to get back to Germany.
  发生了几次小的不幸之后，她设法回到了德国。
  dict.yoduao.com
• 2.If the result is a negative number, you're going to have to cut back on your spending.
  如果结果是负数，你就必须削减开支。
  dict.yoduao.com
• 3.We've been trying to get back to you, Tom, but we think we took your number down incorrectly.
  我们一直试着给你回复，汤姆，但我们觉得我们记错了你的号码。
  dict.yoduao.com

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