例句與造句

1. Commercially available optical flow meters are capable of measuring flow from 0.1 m / s to faster than 100 m / s ( 1000 : 1 turn down ratio ) and have been demonstrated to be effective for the measurement of flare gases from oil wells and refineries, a contributor to atmospheric pollution.
2. It's difficult to find turn down ratio in a sentence. 用turn down ratio造句挺難的