He knew too many secrets and found it hard to keep them all.
2
少有的伤感忽然像潮水一样汹涌而来,我的胸膛忽然憋满了难受的忧伤,不断放大。
The sad little, like all of a sudden, like tidal waves from all of a sudden my chest full of hard for me to hold the distressed, and constantly enlarge.
3
他经受了一次漫长而又很难受的旅行,因为他憋在木箱里有十多个小时。
He had had a long and uncomfortable trip, for he had been confined to the wooden box for over ten hours.