The simple mechanical pump draws water from a shallow well or nearby stream or river for use in irrigation.
VOA: standard.2009.12.18
So, for instance, if you take a glass of water and you pour it into another glass that's shallow or tall, it won't change the amount of water you have.
比如说,你有一杯水,将水倒进另一个更浅或者更深的杯子里,含水量并未发生任何改变
So, for instance, if you take a glass of water and you pour it into another glass that's shallow or tall, it won't change the amount of water you have.
比如说,你有一杯水,将水倒进另一个更浅或者更深的杯子里,含水量并未发生任何改变
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