| 单词 | 成惯例 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔convention〕It's an established convention that the part is played by a woman.由女性扮演这个角色已成惯例。牛津搭配〔culling〕In the reserves of Zimbabwe and South Africa, annual culls are already routine.在津巴布韦和南非的自然保护区，每年的选择性捕杀已成惯例。柯林斯高阶〔cull〕In the reserves of Zimbabwe and South Africa, annual culls are already routine.在津巴布韦和南非的保护区, 每年的选择性捕杀已成惯例。外研社新世纪 |
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