| 单词 | 时起时伏 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔phantasmagoria〕Lowlands under the hills became an undulating phantasmagoria as mirages flickered endlessly.山下低地景致时起时伏变幻无常,犹如海市蜃楼不停地忽隐忽现。英汉大词典〔trough〕There have been peaks and troughs in the long-term trend of unemployment.长期以来失业率一直时起时伏。牛津高阶 |
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