When more water power is wanted in a particular district, than there are falls ofwater to supply it, persons will give an equivalent for the use of a fallofwater.
一旦某一地区对水力资源的需要量超过水利资源的供应量,人们就得为使用水利资源支付等价物。
3
If water levels fall in summer, as they do in most of North America, then beavers lodge entrances may be exposed.