First, high birthrates cannot be altered substantially overnight.
第一，高出生率不可能在一夜之内就被改变。
Denmark, like a number of European countries, is growing increasingly anxious about low birthrates.
像很多欧洲国家一样, 丹麦对较低的出生率越来越感到担忧。
Outofwedlock birthrates have plateaued for blacks.
黑人的未婚生育率已经不再增加。
Although birthrates are decreasing in Taiwan, pet ownership is on the rise.
虽然在台湾出生率逐年降低, 不过养宠物的人越来越多了。
In the case of population growth this momentum can persist for decades after birthrates drop.
人口增长的这种势头在出生率下降后还可以持续四年。
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