By the turn of the century, Pittsburgh had the highest death rate in the United States.

到了世纪交替时，匹兹堡的死亡率居全美之首。

Now the death rate is dropping.

现在，艾滋病的死亡率正在下降。

Now, the death rate is dropping.

现在，死亡率正在下降。

Perforation and death rate were respectively 5.6% and 4%.

穿孔率和死亡率分别为5.6%和4%。

Late treatment was a major reason for the high death rate.

延误就医是死亡率高企的主要原因。