Thought of as tiny biological clocks, telomeres get shorter as we age and eventually become so short that cells die.
端粒被认为是微小的生物钟，它会随着人变老而越来越短，达到最短之时细胞也就死亡了。
In 1991, theoretical physicist John Sidles first proposed the idea of combining MRI with atomic force microscopy to image tiny biological structures.
1991年，理论物理学家约翰·赛德斯首次提出了将原子力显微技术与MRI相结合用以对微小生物结构成像的想法。
A more biological explanation for how the Neti pot works has to do with tiny, hair-like structures called cilia that line the inside of the nasal and sinus cavities.
一个对洗鼻壶有效性更加具有生物学意义的解释与一种称为纤毛的细小毛发状结构有关，它排列在鼻腔以及鼻窦腔内。
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