Online Google Dictionary

birthrate 中文解釋 wordnet sense Collocation Usage Collins Definition
  1. the ratio of live births in an area to the population of that area; expressed per 1000 population per year
  2. Crude birth rate is the nativity or childbirths per 1,000 people per year (in estimation review points).
  3. (Birthrates) The average number of children born to women.