Another team developed a mobile bicycle pump in Ghana to help farmers get water for irrigation.
还有一个小组在加纳开发了一种移动脚踏泵，农民可以此获得用于灌溉的水。
That example I gave last time with the bicycle pump was not quite the right example.
上次我举打气筒的例子不太正确。
Yvette laughed. "Maybe she uses a bicycle pump, " she said.
伊韦特笑了，“也许用自行车打气筒打气来着。”
When the back wheel of the bicycle is rotated, it drives the drive gear and then forces the centrifugal pump to operate and pump water.
当自行车后轮转动时，带动传动齿轮并驱动了离心泵运转抽水。
Can you lend me a pump to blow up my bicycle tyres?
你能借给我个打气筒给车胎打打气吗？
Can you lend me a pump to blow up my bicycle tyres?
我要替脚踏车打气，可以借我打气筒吗？
You do it so quickly that the heat flow between the inside of the bicycle pump and the outside is too slow compared to the speed at which you compress.
我们用力很大，于是压缩得很快，打气筒内外热传递的速度，与之相比要慢得多。
You do it so quickly that the heat flow between the inside of the bicycle pump and the outside is too slow compared to the speed at which you compress.
我们用力很大，于是压缩得很快，打气筒内外热传递的速度，与之相比要慢得多。
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