北师大版Unit22Lesson3 Nature is turning on us 中有这样一句话：On top of that add global warming. 如何理解这句话?

On top of this, they are not able to form a connection with other people or the world around them. (北师大版Unit21 Communication Workshop)

解释：

这里的on top of意思是“除……之外”。On top of that, (we should also) add global warming.

其它例句：

1. On top of that, add climate change and the specter of global warming.

除此之外，还要加上气候变化和全球变暖带来的灾难。

2. On top of that, the most important thing is to grow.   

除此之外，最重要的还是公司发展。

3. On top of that the company will help anyone who wants to follow an outside course.

此外，谁要去外面进修，公司也愿意帮助。

4. He lost his job and on top of that his wife left him.

他失业了，除此以外，妻子又弃他而去。

5. On top of that there's Hong Kong's role and potential as banker to the juggernaut next door : China." End of quote.   此外，对毗邻的庞大经济体系中国来说，香港可以担当银行家的角色，并且有潜质朝这个方向继续发展。