日期:
来源:雅诚德英语网
It is known that the distribution of groundwater is uneven, and that much of it lies at great depths.
大家知道,地下水的分布是不均匀的,而且它们大部分都埋在很深的地方。
It is known that the distribution of groundwater is uneven, and that much of it lies at great depths.
大家知道,地下水的分布是不均匀的,而且它们大部分都埋在很深的地方。