On the whole, topic-comment sentences, the main sentence type in Chinese, are led by topic and based on mainly a single-track system-meaning.
总体来说，主题句是主题统领下的、近乎语义单轨的结构，是汉语的主要句型。
Bitemporal tables allow you to track both system and business time in a single table, and time periods can be added to indicate start and end points.
双时间(bitemporal)表支持在单个表中同时跟踪系统时间和业务时间，可以添加时间区间来表明起始和结束点。
The thesis provides some insights and references for the design and operational management of the urban cross-saddle single-track traffic system.
本文研究成果对城市跨座式单轨交通的设计和运营管理具有较好的借鉴和参考价值。
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