Howard wanted to be a popular singer, but stage fright crippled him.霍华德想成为流行歌手，但因怯场而心生畏惧。Howard was faultlessly dressed in a dark blue suit.霍华德身着深蓝色套装，衣着无可挑剔。One vehement critic is Michael Howard.其中一位言辞激烈的评论家是迈克尔·霍华德。...
Influences of experimental parameters were studied using 4 - chlorophenol as model pollutant.以4-氯苯酚为模型污染物,研究不同反应条件的影响.Succinic acid was used as target during ozonation of chlorophenol, whose concentration measured by ion...