以下为句子列表：
英文: An optical transmission system including several concave mirrors is designed to improve the sensitivity of measurement by extending the optical path for measurement.
中文: 还特别设计了一个利用多个凹面反射镜来延长测量光程的光学系统，可提高系统的检测灵敏度。
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英文: Camera use transmitter and CCD components, fixed-focus camera, or electrical zoom lens, optical transmission control signal.
中文: 摄像仪采用光端机、CCD组件、定焦镜头或电动变焦镜头，以光缆传输监控信号。
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英文: Indispensable for high quality optical carrier signal reception in a large dynamic range, AGC analog optical receivers are widely used in the optical transmission of radio and microwave signals, such as fiber CATV, direct broadcast satellite TV, wireless
中文: 摘要自动增益控制模拟光接收机广泛应用于光纤有线电视、光纤直播卫星电视、无线通讯及雷达等射频微波信号光传输，是实现大动态范围光载波信号高质量接收必不可少的一项技术。
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英文: Recently China Mobile has signed the equipment contract for the fourth stage project of provincial optical transmission network transmission system and the fourth stage project for long term exchange network with Huawei, ZTE, and FiberHome, with the contr
中文: 近日，中国移动又与华为、中兴、烽火签署了省际光传送网传输系统四期工程和长途软交换网四期工程设备合同，采购总金额达2.5亿元。
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英文: Since its foundation,China TieTong invested millions of RMB and adopted D to build a high-speed backbone optical transmission network composed of five fiber loops: Northeast, Northwest, Southwest, Southeast and Beijing-Shanghai-Guangzhou Loop, realizing t
中文: 自成立以来，中国铁通投资数百亿元，采用先进的密集波分技术，组建了京沪穗高速环、西南环、西北环、东北环、东南环等五大骨干传输，并且实现全国骨干传输网络的统一网管指挥和调度。
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