reproductive rate

常見例句

Objective To compare the effects of colony oviposition and single tube oviposition for improving the reproductive rate of Anopheles anthropophagus .
目的比較群體產(chǎn)卵法與單管產(chǎn)卵法對提高嗜人按蚊繁殖率的效果。
Although the birds aren't listed as endangered, threats to their populations can pose serious risks, because the species has a long life span and a low reproductive rate.
盡管目前棕頸鷺沒有被列入瀕危名單，但由于壽命較長，繁殖率較低，它們的種群數(shù)量亦面臨著嚴(yán)重的威脅。
Under the conditions of less rainy days during the blooming period, the temperature is the main factor influencing the reproductive rate, then is the duration of day and the velocity of wind.
在陰雨較少的情況下花期溫度是影響繁殖率高低的主導(dǎo)因素，其次為日照時數(shù)和平均風(fēng)速。

Polar bears are a long-lived species with a low reproductive rate, so recovery from overharvesting could take many decades.
ECONOMIST: A clash between environmentalists and Inuit rights
Whale researchers use population models that factor a species' reproductive rate and its natural mortality to come up with an estimate of how many are likely dying.
MSN: Feds to reroute SF Bay ships to protect whales
Because of illiteracy, women face major socioeconomic challenges including high risks with regard to reproductive health with reports suggesting that the maternal mortality rate in the country is among the highest in the world.
UNESCO: Learning for Life