蛋白质又可以在细胞内，或细胞外进行很多活动，制造出生物体的不同部位，以及促使其他基因发生同样的变异，等等。
Proteins can then do a number of jobs in the cell or outside it, working to make parts of organisms, switching other genes on and so on.
它可以自由地通过，比方说，从细胞外到细胞里，或从膜的一边到另一边。
It can pass freely, let's say, from the outside to the inside of the cell, or from one side to another of a membrane.
第二大脑，约有一亿神经细胞，比脊髓或外周神经系统都要多，格申说。
The second brain contains some 100 million neurons, more than in either the spinal cord or the peripheral nervous system, Gershon says.
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