例句：
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。
She's dead set on getting this new job.
她打定主意要得到这个新工作。
She could be dead for all I know.
她说不定已经死了。
