例句與造句

1. The compound is used to prepare other osmium complexes.
2. The osmium complex is also known.
3. Catalytic combinations : i )  vanadium derivative plus pyrazine-2-carboxylic acid ( PCA ) ; ii )  a dinuclear manganese ( IV ) complex plus carboxylic acid; iii )  an osmium complex plus amine.
4. It's difficult to find osmium complex in a sentence. 用osmium complex造句挺難的