例句與造句

1. the preparation of the um-level granularity rare-earth composite oxide catalysts
   制備較大粒徑稀土復(fù)合氧化物條件的研究
2. study of catalytic properties of perovskite-type composite oxides catalysts for reduction of so2 to elemental sulfur and no decomposition by ch
   系鈣鈦礦型汽車(chē)尾氣凈化催化劑的性能研究
3. It's difficult to find composite oxide catalyst in a sentence. 用composite oxide catalyst造句挺難的