They are still grieving for their dead child.
他们还在为死去的孩子伤心。
Don't speak ill of the dead.
对死去的'人，别说他的短处。
We had come to a dead end in our research.
我们的研究工作已陷入绝境。
I'll never forget it to my dying day.
我将终生不忘。
I'm dying to know what happened.
我很想知道发生了什么事儿。