例句與造句

1. A manual water pump stood outside one house.
2. This is the principle behind positive displacement pumps, like the manual water pump for example.
3. This is the principle behind a "'positive displacement pump "', for example the manual water pump.
4. There is a kind of manual water pump, invented at the " appropriate technology " Columbian town of Gaviotas which they call a " sleeve pump " ( Bomba de Camisa ).
5. It's difficult to find manual water pump in a sentence. 用manual water pump造句挺難的