例句與造句

1. The saying was : " It takes one gallon of fuel to make one gallon of fresh water . " Shortly before the war, Dr . R . V . Kleinschmidt developed a compression still, which became known as the Kleinschmidt Still, for extracting fresh water from sea water or contaminated water.
2. It's difficult to find compression still in a sentence. 用compression still造句挺難的