以下为句子列表：
英文: Being an important part in urban mass transit, signal system plays a significant function in the safe, accurate and highly efficient traffic operation, but the incomplete design standard has caused some uncertain properties to the system designing.
中文: 摘要信号系统作爲轨道交通工程中重要的组成部分，对行车的安全、正点、高效的运行起著至关重要的作用，但由于其中的设计标准不全面，给系统设计方案造成了一定的随意性。
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英文: These projects have ranged from analog RF communications IC design in the field of mobile telephony, mobile handset, cordless and WLL solutions, production ready design of measurement instruments and complete design and implementation of a factory monitor
中文: 具体涉及移动电话所使用的模拟射频通信集成电路设计，手机、无绳电话及无线本地环解决方案，可即刻付诸生产的测量仪器设计以方案以及完整的工厂远程监控系统设计与应用解决方案。
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