But people who favor the influx of s the cheap labor force, on the other hand, maintain that migrants are needed to support the massive urban infrastructure construction program.
他们主张应该严格限制进入中国城市的流动工人。但是，另一方面，支持廉价劳动力流入的人主张，为了支持大规模的城市基础设施建设规划，流动人口是必需的。
The U. S. Green Building Council's LEED green building certification system is the world's foremost program for the design, construction, maintenance and operations of green buildings.
美国绿色建筑委员会的LEED绿色建筑认证体系，是全球绿色建筑在设计、施工、维护和运营方面最重要的系统。
The U. S. Green Building Council's LEED green building certification system is the world's foremost program for the design, construction, maintenance and operations of green buildings.
美国绿色建筑委员会的LEED绿色建筑认证体系，是全球绿色建筑在设计、施工、维护和运营方面最重要的系统。
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