例句與造句

1. Unocal Corp ., Los Angeles / Wilmington, Calif . ( 118, 750 bbl / day ) U : Upgrade modifications of the fractionation unit at Los Angeles and the reformer, alkylation unit, catalytic light ends fractionation unit, sulfuric acid plant, hydrotreater, reformer, hydrocracker and mid-barrel processing unit at Wilmington are to be completed by the March California Phase II reformulated gasoline deadline.
2. It's difficult to find light ends fractionation in a sentence. 用light ends fractionation造句挺難的