1. 死亡率：例如,我在<人口问题>>这节课中,分两部分介绍了和人口问题有关的一些基础知识. 首先我介绍了如出生率(Birth Rate)、死亡率(Death Rate)、人口自然增长率(Natural Increase)等基本的英文单词,为课程的顺利进行做好词汇的铺垫.

2.

2. 死亡率,rate比率：male =男性; | death rate =死亡率,rate比率; | heart disease=心脏病;

3. 死亡：dating relationship 约会关系 | death rate 死亡 | decision 决定

1. 死亡率
    The death rate is the number of people per thousand who die in a particular area during a particular period of time.

death rate的解释

    e.g. By the turn of the century, Pittsburgh had the highest death rate in the United States.
           至世纪之交时，匹兹堡的死亡率居全美之首。

1. the ratio of deaths in an area to the population of that area
    expressed per 1000 per year

    Synonym: deathratemortalitymortality ratefatality rate