例句與造句

1. W . R . GRACE & CO ., Boca Raton, Fla ., an international specialty chemicals concern, announced a $ 58-million expansion plan for its global Grace Davison operations, involving the construction of two new U . S . plants to increase production of fluid cracking catalysts
2. W . R . GRACE & AMP; CO ., Boca Raton, Fla ., an international specialty chemicals concern, announced a $ 58-million expansion plan for its global Grace Davison operations, involving the construction of two new U . S . plants to increase production of fluid cracking catalysts
3. It's difficult to find fluid cracking catalyst in a sentence. 用fluid cracking catalyst造句挺難的