| 单词 | you can't teach an old dog new tricks |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔dog〕I tried to get my mother to start using a computer, but she says you can't teach an old dog new tricks.我想让我妈开始用电脑，但是她说老古董学不会新东西。韦氏高阶 |
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