| 单词 | 起初不容易 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔nature〕It's not easy at first, but it soon becomes second nature.起初不容易，但很快就习惯了。柯林斯高阶〔nature〕It's not easy at first, but it soon becomes second nature.起初不容易, 但很快就习惯了。外研社新世纪 |
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