这词组的意思是“基于某某理由、理据、基础.”而跟着作出一些判断、结论等等.是可以用在句首的,举一两个例子如下：
1.On the grounds that the Police had withheld crucial evidence,the court overturned that decision.(基于警方隐藏、扣起了关键证据,法院以此为由撤销了那项判决.）
2.On the grounds of excessive spending,the headmaster was against the redecoration of the school.(基于装修费用可能严重超支,校长对此表示反对.）
当然,这句话也可以反过来放在句子后面,“The headmaster was against the redecoration of the school on the grounds of excessive spending.”意思是一样的.