【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 other hand 另一方面
（1）On the other hand, many women choose to go out to work.
另一方面，许多妇女又选择外出工作。
（2）On the other hand, your stomach would turn at the idea of frying potatoes in animal fat——the normally accepted practice in many northern countries.
在另一方面，一想到用动物油煎马铃薯，你便会作呕。然而在许多北欧国家里，这是为大家接受的通常习惯。
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. on the side 作为兼职/副 业
（1）He's a teacher but he does some journalism on the side.
他是教师，可还兼职做一些新闻工作。
（2）He is a mechanic who buys and sells cars on the side.
他是一个兼营买卖汽车的技工。