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- Natural Steppe community was degraded because of have grazing.We investigated the relationships between biodiversity, primary production and ecosystem stability during the period of restoration. 草原自然植被群落由于过牧造成严重地退化，试验调查了恢复演替过程中的生物多样性、初级生产力以及稳定性之间的关系。
- The vast natural steppes in the lower reaches of the Tarim River are mainly distributed in the oasis-desert ecotone,a typical area with fragile ecology. 塔河下游地区广大的天然草地主要分布在绿洲-荒漠过渡带,该地带也是一个典型的生态脆弱带。
- 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。
- He's a natural for the role of Lear. 他是李尔王这一角色的理想人选。
- Most first-class footballers are natural athletes. 多数一流的足球运动员都是天生的健将。
- Only humans have a natural upright posture. 只有人类才有自然直立的姿势。
- The area has been designated as natural reserve. 该地区已被指定为一个自然保护区。
- The country abounds in scenic and natural wonders. 这个国家有许多风景优美的自然景观。
