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for subject
Ecology
containing
一生
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all forms
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一年生草地
annual rangeland
一种产品的生态无害特性
ecologically sound characteristics
(of a product)
单一种类不可再生资源开采成本函数
a single variety nonrenewable resources mining cost function
单一种类不可再生资源开采成本函数
function of extraction cost of a single kind of non-renewable resources
单一种类不可再生资源最优开采
optimal extraction of a single kind of non-renewable resources
夏季一年生植物
summer annuals
生活饮用水地表水源一级保护区
first-class protection zones for surface domestic and drinking water sources
生物一硝化一脱硝
bio-nitrification-denitrification
非单一种类不可再生资源最优开采
optimal extraction of a non-single kind of non-renewable resources
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