birthrate
英 ['bɜ:θˌreɪt] 美 ['bɜθˌreɪt]

n.

出生率；

变形

复数：birthrates

英英释义

birthrate[ 'bə:θreit ]

• n.the ratio of live births in an area to the population of that area; expressed per 1000 population per year

  同义词：birth ratefertilityfertility ratenatality

双语例句

用作名词(n.)

1. The birthrate is on the decrease.
   人口出生率正在下降。
2. The birthrate in this city is increasing at a ratio of 0.6 to a thousand every year.
   这个城市的出生率以每年千分之0.

权威例句

On the Birthrates of Galactic Neutron Stars
The birthrate and initial spin period of single radio pulsars
Birthrates of low-mass binary pulsars and low-mass X-ray binaries
Pulsar Statistics - the Birthrate and Initial Spin Periods of Radio Pulsars
The initial mass function and stellar birthrate in the solar neighborhood
Manifestations of poverty and birthrates among young teenagers in California zip code areas
Demography and degeneration: Eugenics and the declining birthrate in twentieth-century Britain.
The chromospheric age dependence of the birthrate, composition, motions, and rotation of late F and G dwarfs within 25 parsecs of th...
The atmosphere of subluminous B stars. II - Analysis of 10 helium poor subdwarfs and the birthrate of sdB stars
The effects of economic conditions and access to reproductive health services on state abortion rates and birthrates