【词组解析】
1. on the grounds of 根据,以...为由
（1）He was found not guilty of murder on the grounds of diminished responsibility.
他未被判谋杀罪是基于精神失常而减轻了刑事责任。
（2）The cutbacks are justifiable on the grounds of cost.
削减符合成本方面的考虑。
2. on the contrary 正相反
（1）You think you are clever; on the contrary, I assure that you are very foolish.
你自以为很聪明，相反地，我确信你很傻。
（2）I would like to disabuse your mind of the idea that your cousin has a feeling of hostility to you. On the contrary he spoke to me in the most friendly terms of you.
我想消除你以为你的堂兄对你有敌意的误会。相反，他跟我说到你时，是以最友善的口吻说的。
3. on the point of 即将...的时刻
（1）I was on the point of going to bed when you rang.
你打电话的时候我正要睡觉。
（2）For a moment they seemed almost on the point of blows.
看上去他们几乎快要打了起来。
4. on the road 在旅途中
（1）New cars start to depreciate as soon as they are on the road.
新车一上路就开始贬值。
（2）Some glass on the road punctured my new tyre.
路上的玻璃刺破了我的新轮胎。
5. no longer 不再
（1）We can no longer support the President's continuance in office.
我们不能再支持总统继续任职。
（2）Vegetarians are no longer dismissed as cranks.
素食者不再被视为有怪癖的人。
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