以下为句子列表：
英文: Based on the practice in PSD system design in Hongkong Metro and Guangzhou Metro, the functions, social benefit, economic returns of PSD system in metro arc presented, and its application prospect in building new metro lines and rebuilding old ones is put
中文: 摘要结合香港地铁、广州地铁屏蔽门系统的设计实际，阐述屏蔽门系统在地铁中的功能以及社会效益、经济效益，并指出屏蔽门系统在今后地铁新线建设及旧线改造中的应用前景。
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英文: In particular, we should bear in mind the idea of gaining survival, development and economic returns through offering servicesto effectively improve the service and management standard of BCC, making it the wings for another round of business boom for BCC
中文: 通过企业转型，我们尤其要树立起“以服务求生存，以服务求发展，向服务要效益”的观念，扎扎实实提高北京通信的服务水平和管理水平，使之成为北京通信再次腾飞的双翼。
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英文: It was apparent that under the various environmental conditions of the network sites, fertilizer played a major role in reducing soil loss and runoff, reducing indigenous nutrient loss, and increasing crop yields and economic returns in most cases.
中文: 很明显，在各个网络试验点的不同环境条件下，肥料在降低土壤流失和径流、减少土壤本身损失、增加作物产量并在许多情况下增加经济收入方面起着重要的作用。
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