He derived great satisfaction from knowing that his son was happy.

　　得知兒子很幸福他深感欣慰。

　　It doesn't really help matters knowing that everyone is talking about us.

　　知道大家都在議論我們也于事無(wú)補。

　　He took his time answering, knowing that he must select his words with great care.

　　他意識到自己必須言辭謹慎，于是不慌不忙地回答著(zhù)問(wèn)題。

　　He said his goodbyes knowing that a long time would pass before he would see his child again

　　他道了別，知道要過(guò)很久才能再見(jiàn)到他的孩子。

　　In the future people can go to a football match knowing that they are safe from hooliganism

　　今后人們去看足球比賽時(shí)可以不必擔心會(huì )受到足球流氓的騷擾。