Urban large-scale park greenbelts play a great role in the construction of urban greenbelts because of their particular functions.

大型公园绿地因其特殊的功能和作用在城市绿化建设中占有举足轻重的地位。

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Later, once the advancing deserts were halted, smallholders started harvesting and selling lumber for a living, while keeping the sheltering greenbelts in place.

后来，治沙取得成功，小农开始以采收和销售木材作为生计，同时维护绿色防护带。

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Major systems commonly include bypass tunnels, greenbelts, and roads which are used to handle the runoff which exceeds the capacity of the minor drainage system.

大型系统通常包括旁路通道，绿化带和道路，用来处理超过小型排水系统处理能力的径流。

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But all the fanfare associated with the value of biodiversity, the excitement of discovering new species, expanding or at least maintaining parklands, greenbelts, and critical biological corridors has in a matter of a few days once again been tainted by doubts and no small terror.

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If successful, the firm believes this type of system could form part of a new approach to sustainable farming, making use of urban greenbelts while helping to reduce the carbon footprint associated with food production -- which accounts for up to 30% of total emissions worldwide, according to a 2008 Greenpeace report.

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