例句與造句

1. the results showed that in scco2 cyclotrimerization of terminal acetylenes was carried out smoothly to regioselectively afford the corresponding benzene derivaties using pdbr2 as the catalyst
   研究結(jié)果表明：二氧化碳介質(zhì)中使用溴化鈀為催化劑可以順利地催化炔烴發(fā)生環(huán)三聚反應(yīng)，區(qū)域選擇性生成含苯環(huán)芳香族化合物。
2. It's difficult to find terminal acetylene in a sentence. 用terminal acetylene造句挺難的