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- It is found in nature only in traces produced by natural neutron irradiation in uranium ores. It is produced artificially by neutron irradiation of uranium-238. 钸广泛用作核反应堆燃料和核子武器装料。原生性的钸仅在铀矿石中有痕量发现,由自然的中子辐射作用产生,造成这种中子辐射的是铀-238。
- 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。
- MATHEMATIC-PHYSICAL EQUATIONS OF NATURAL NEUTRON RADIATION FIELD ON THE AIR-GROUND INTERFACE 地-空界面上大气中子辐射场的数理模型
- A mathematic-physical equation of the natural neutron radiation field on the air-ground interface 地-空界面上天然中子辐射场的数理模型
- Study on the determination of water content by measuring natural neutron flux on the ground-atmosphere interface 天然中子源中子测水技术的初步研究
- 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。