It takes about a day until these cells make it to your aching muscles.

这些细胞需要大约一天的时间才能到达你疼痛的肌肉组织。

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How then can these cells differentiate and form structures as different as roots, stems, leaves, and fruits?

那么这些细胞是如何分化并形成像根、茎、叶和果实那样不同的结构的呢？

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Because these cells are among the largest in the vertebrate brain, they were the first neurons to be identified.

由于这些细胞是脊椎动物大脑中最大的细胞，它们是最早被识别出来的神经元。

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For the scientists who used these cells, HeLa was just a name.

VOA: special.2010.07.21

All these cells come from the bone marrow and biologists have traced the formation of these cells in great detail.

所有这些细胞都来自骨髓,而生物学家已经很详细地,研究了这些细胞的形成过程

耶鲁公开课 - 生物医学工程探索课程节选

Remember that these cells are relatively large compared to bacteria and so diffusion doesn't occur very quickly over this length scale.

要知道这些细胞相对细菌而言,还是比较大的,扩散作用在这种尺度上,发生得不是那么快

耶鲁公开课 - 生物医学工程探索课程节选

These cells are involved in the development of the nervous system and other tissues.

BBC: NEWS | Health | Skin cells 'fight child cancer'

These cells can differentiate into many different cell lines, including cardiac, neuro, or even skeletal muscle.

CNN: Dr. Sanjay Gupta: Understanding stem cell research

These cells produce dopamine - a chemical which plays a key role in movement.

BBC: NEWS | Health | Activity 'cuts Parkinson's risk'