简要介绍了原子力显微镜这一新型表面测试技术在猪皮胶原精细结构研究中的应用方法。
The usage of AFM(atomic force microscope), which is a new method of surface test, in studying the fine structure of natural pig collagen was discussed.
研究人员发现在北方天穹，精细结构常数在越远的地方就越小，或者说天文学家所看到的过去越久远。
The researchers found that in the northern sky, the fine-structure constant gets smaller with increasing distance, or as astronomers look farther back in time.
天体物理学家多年来一直都在研究精细结构常数——称为alpha常数——寻找它可能发生变化的蛛丝马迹。
Astrophysicists have been studying the fine-structure constant - known as the alpha constant - for years, searching for hints that it might change.
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