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- Multiplication or increase, as by natural reproduction. 繁殖数目增加或增多，比如天然生殖
- Bulette's offspring are in zoos around the world and have even been acclimatized in African rivers where natural reproduction cannot keep up. 布列德的后代散布于世界各地的动物园内，而且甚至在难以自然繁殖的非洲河流也适应得很好。
- Agriculture is with life organism regards production as the object, have the manufacturing specialty that natural reproduction and economic reproduction interweave. 农业是以生命有机体作为生产对象，具有自然再生产和经济再生产相交织的生产非凡性。
- The result of that experiment will likely be a human chimera -- a person that shares genes from two people but isn't the result of natural reproduction. 这种实验的结果很可能是嵌合体--拥有两个人的基因但非自然繁殖结果的人。
- Two different selfing mechanisms, uncovered here, may provide a partial compensation for the natural reproduction of this alpine species in the arid alpine habitats when flowering at the early summer. 因此两种不同类型的自交机制为该早期开花植物异花访花昆虫的不足提供了一定程度上的繁殖补偿。
- Natural Reproduction of Mandarin Duck in Captivity 圈养条件下鸳鸯的自然繁殖
- One, the characteristic of process of introductive agriculture production, biologic nature reproduction and economic reproduction interweave together each other. 一、前言农业生产过程的特点，是生物的自然再生产与经济再生产相互交织在一起的。
- It is natural for a cat to catch mice. 猫捉老鼠是本能。
- It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
- Many natural materials are becoming scarce. 许多天然原料越来越少。
- Our motherland flows with natural resources. 我们祖国蕴藏着丰富的天然资源。
- Events took their natural course. 事态依自然进程发展。
- She has a natural wave in her hair. 她的头发自然卷曲。
- Magnetism is a natural phenomenon. 磁力是一种自然现象。
- It is difficult to be natural when one is tense. 人在紧张的时候很难泰然自若。
- The egoism of an artist sometimes seem natural. 艺术家的自负有时看起来是自然的。
- They used only natural pigments to dye the wool. 他们只用天然颜料染毛织品。
- Children are natural exhibitionists. 儿童天生喜欢自我表现。
- Everything we used was made from natural materials. 我们所用的一切都是由天然材料做成的。
- It's quite natural that you should succeed. 你的成功是很自然的事情。
