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来源:雅诚德英语网
Such programs are much needed because in many arid lands there is only a vague idea of the extent of groundwater resources.
这样的计划是非常必要的,因为在许多干旱地区,我们并不清楚其地下水资源的范围。
Such programs are much needed because in many arid lands there is only a vague idea of the extent of groundwater resources.
这样的计划是非常必要的,因为在许多干旱地区,我们并不清楚其地下水资源的范围。