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- Objective: An ovarian ectopic pregnancy is a rare form of ectopic pregnancy after either natural conception or in vitro fertilization-embryo transfer (IVF/ET). 摘要目的：卵巢子宫外孕不论是自然受孕也好或是在施行试管婴儿术后也罢，其发生率都很低。
- Among the plentiful thoughts of ecofeminism, the Nature Concept Theory is a shining point. 其中生态女性主义自然观是生态女性主义丰富思想中的一个亮点。
- Most humans are familiar with hierarchies in their business and family relationships, but hierarchies are not natural concepts for most people when it comes to storing and retrieving arbitrary information. 大多数人对业务关系和家庭关系中的层次非常熟悉，但是大多数人在存储或者检索信息时，层次关系并不是一个自然概念。
- The slightly bitter tea helps the buddism to meditate about life ,purify the spirit and discipline the temperament.while Taoism introduced lyrical and natural concepts into the tea culture. 日本茶文化的历史是随着中国茶文化的历史发展而发展起来的。至上个世纪为止，日本茶文化的发展一直受到中国大陆茶文化的影响，大陆茶文化在各个历史时代所创造出的新形式都逐次波及日本茶文化。
- It is natural for a cat to catch mice. 猫捉老鼠是本能。
- This paper illustrates the ethnic cultural traditions of Owenk，Olunchun, Daur nationalities on nature worship and their nature concept, and analyzes the objective functions of the traditions. 本文对三少民族共有的自然崇拜及自然观做了阐述，并简要分析了这一文化现象的客观作用。
- 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。
