例句與造句

1. Reasonable design , big flow zone , smoothbore , no heap of dirty , small flow resistance
   設(shè)計合理,流通面積大,通徑平滑過渡,無臟物堆積現(xiàn)象,流通阻力小。
2. It's difficult to find smoothbore in a sentence. 用smoothbore造句挺難的