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- P receptors are divided into two major classes termed adenosine or P1 receptors, at which adenosine is the principal natural ligand, and P2 receptors, at which ATP, ADP, UTP and UDP are the principal natural ligands. P1受体的内源性配体主要是腺苷(ADO),P2受体的内源性配体主要有ATP、二磷酸腺苷(ADP)、三磷酸尿苷(UTP)和二磷酸尿苷(UDP)等。
- There are the natural ligands, immunophilin, for the drugs in cells.Immunosuppression is induced only by the drug in form of drug-immunophilin complex. 发现了生物体内存在其天然配基----亲免素，并通过形成药物亲免素复合物发挥免疫抑制作用，故又称为亲免素结合类免疫抑制剂。
- 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。
- Keywords high performance liquid chromatography（HPLC）;curcumin;bonded silica stationary phase;chromatographic properties;retention mechanism;natural ligand; 高效液相色谱法;姜黄素;硅胶键合固定相;色谱性能;保留机理;天然配体;
- 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。
