| 单词 | safeguarding |
| 释义 | 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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