鸭子是在有大量水的地方觅食和繁殖的鸟类，但近几十年来，由于干旱，它们的栖息地一直在缩小。
Ducks are birds that feed and breed in areas where there is a lot of water, but their habitats have been shrinking in recent decades because of the droughts.
但近几十年来，越来越多的中国年轻人自发地施展才艺，突出个性与独特魅力。
But recent decades have witnessed an increasing willingness among young Chinese to show off their talents, highlight their individuality and be unique.
想要废除君主制的人群比例近几十年来一直徘徊在30%左右，但漠视和嘲笑的人数却增加了。
The proportion of Britons who want to abolish the monarch has hovered around 30% for decades, but indifference and ridicule have risen.
戴维斯领导的研究小组发现，虽然胎儿死亡率在近几十年来总体上有所下降，但男性胎儿的死亡比例却在上升。
Davis's team found that while fetal deaths have declined overall in recent decades, the proportion of male deaths is growing.
为了支持他自己的观点，伊肯伯里整合了近几十年来的自由国际主义理论。这样的综合虽一般不易成功，但确极富启发。
In making his case, Ikenberry provides an unusually accessible and instructive synthesis of the last several decades of liberal internationalist theory.
虽然近几十年来出现了大量的人脸检测与识别的算法，但识别率、识别速度以及算法鲁棒性等方面还是不够理想。
Although a lot of arithmetic of face detection and recognition has come forth, the recognition rate, the recognition velocity and the robustness of arithmetic etc are not ideal enough yet.
近几十年来，尽管统计手段和方法不断改进，但统计预报的准确率并未得到明显提高。
Although the statistical means and methods were unceasingly improved in recent years, the accuracy of statistical prediction have not marked progress.
近几十年来，尽管统计手段和方法不断改进，但统计预报的准确率并未得到明显提高。
Although the statistical means and methods were unceasingly improved in recent years, the accuracy of statistical prediction have not marked progress.
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