So approximations must be made, especially when larger molecules such as proteins are involved.

因此，近似法必须被采用，特别是对于有类似蛋白质这样的大分子参与的化学过程。

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The membrane is impermeable to blood cells and large molecules such as proteins, but small ones can get through it.

血液分子和一些大分子例如，蛋白质，是无法渗透隔膜的，而小分子仍然可以通过。

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In other cases, they can also stabilize the structure of macromolecules such as proteins or RNAs for normal function.

在其他方面，金属离子也可以稳定像蛋白质或核糖核酸等巨分子的结构，而使它们能够正常地作用。

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Antivenom contains proteins from animals such as horses or sheep.

VOA: special.2010.01.25

It also makes biotechnology products such as purified proteins and antibodies.

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The LEDs on GentleWaves shoot weak light (less than 25 watts) through the skin's epidermis to fibroblast cells, which produce such structural proteins as collagen and elastin.

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There is accelerated loss of fat stores and then consumption of proteins such as skeletal muscle.

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