例句與造句

1. test method for trace sediment in lubricating oils
   潤滑油痕跡沉淀測試方法
2. standard test method for trace sediment in lubricating oils
   潤滑油中痕量沉積物的試驗方法
3. It's difficult to find trace sediment in a sentence. 用trace sediment造句挺難的