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The slaughter of a large number of animals. （对大量牲畜的）大批屠宰
A large number of animals hoard plant seeds. 许多动物有贮藏植物种子的行为。
There are a large number of animals in the rainforest . 在热带雨林里有许许多多动物。
Yet replacing monkeys with mice does not cut the number of animals used. 但是，用家鼠代替猴子进行实验并不能减少实验用动物的数量。
There is an undeniable fact that the number of animals is declining faster than ever before. 这是个不可否认的事实，动物的数量比以前任何时候都减少得快。
Today, Earth is a lush world filled with a countless number of animals and plant species. 如今地球是一个繁荣昌盛的世界，它拥有数不清的动植物物种。
There is an undeniable fact that the number of animals is declining faster than everbefore. 动物的数量在迅速减少。
Affecting a large number of animals at the same time within a particular region or geographic area. Used of a disease. 动物流行病的同时在一特定区域发生，能危害大量动物的。用于疾病
Animal rights groups grossly exaggerate the number of animals used in research. 动物权益组织严重夸大应用于实验研究的动物数量。
With the number of zoos increasing, living environment of animals in zoo is on the slide . 摘要随着动物园数量的不断增多，动物生存环境日益恶化。
The number of fish in coastal waters has decreased. 沿海鱼的数量已减少了。
Active, preventative programs aimed at reducing the number of animals who must be killed;e.g. 对那些不得不被杀掉的动物，如何去减少其数量，要采取主动、带预防性的措施；
A number of new hats were on parade at the wedding. 在婚礼上见到有些人戴著新式的帽子。
A number of satellites are now circling the earth. 一些人造卫星现在正环绕地球飞行。
As research techniques become more advanced, (he number of animals used in experiments may decrease, but stopping testing on animals altogether is a long wav away. 随着研究技术的日益先进，用于实验的动物的数量可能会减少，但距离彻底停止使用动物还很遥远。
I seriously question a number of your assertions. 对你所坚持的说法，有几点我甚为怀疑。
This incident recalls a 2007 episode in which melamine introduced into pet food resulted in the deaths of a number of animals. 该事件不禁让人回忆起2007年的三聚氰胺加入到宠物食品中导致许多动物死亡的事件。
These methods shall be regularly reviewed and improved with a view to reducing testing on vertebrate animals and the number of animals involved. 尤其是对人类毒性，信息可以通过使用替代方法用脊椎动物试验之外的其他方法生成。
A considerable number of guests have come. 相当多的客人已经来了。
A number of possibilities come to mind. 我脑里出现了好几种可能性。