They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions. 它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.
公牛用角把斗牛士挑起后抛入空中.The bull tossed the matador.那公牛显然对批评话是敏感的, 所以它把斗牛士全忘记了,向那醉汉冲了过去.Apparently sensitive to criticism, the bull forgot all about the matador and charged at the drunk.男高音歌手正在唱《卡门》中的 “ 斗牛士之歌 ”.The tenor was sin...
The minimum speed on the freeway is 45 kms per hour.这条高速公路上的最低时速为45公里.A limousine swept her along the busy freeway to the airport.一辆豪华轿车载着她沿着拥挤的高速公路飞速驶向机场。The speed limit on the freeway is 55mph.高速公路限速每小时 55 英里。...Boston...
Those who refuse to repent, he said, will be punished...那些拒不悔改的人,他说,将会受到惩罚。Remission of sins is promised to those who repent.悔罪者可得到赦免.I am a sinner and I need to repent of my sins.我是个罪人,必须忏悔我的罪过。Never too late to repent....