| 单词 | 原因尚不清楚 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔catch〕For reasons which are not yet known, the factory caught fire late yesterday evening.昨晚工厂失火，原因尚不清楚。剑桥高阶〔know〕The cause of the fire is not yet known.火灾的原因尚不清楚。牛津高阶〔obscure〕Official policy has changed, for reasons that remain obscure.官方的政策已改变，原因尚不清楚。剑桥高阶〔precise〕The precise cause of the disease is unknown.造成这种疾病的确切原因尚不清楚。朗文当代〔quite〕Quite why he left is unclear.他离开的真正原因尚不清楚。韦氏高阶〔unclear〕The reasons for this remained unclear.这样做的原因尚不清楚。外研社新世纪 |
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