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单词闭塞系统
例句 DEFINITIVE EXAMPLES 权威例句〔block system〕A system for controlling and safeguarding the flow of railway trains in which track is divided into blocks, each controlled by automatic signals.闭塞系统:用于控制和保障火车安全行驶的系统,它每一路段的轨道上都由自动信号控制美国传统
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“你没车没房没卡,拿什么和我谈恋爱?”“......我有高达......”-「gundam」  

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