They're polymers, made of long chains of repeating chemical units.

它们是聚合物，由长链重复的化学单元组成。

It's a polymer, meaning it's made of long chains of repeating units of atoms strung together.

它是一个聚合物，说明它是由一长串相同的原子而成。

There will be many, many kilograms in each repeat unit of the cell.

细胞的每个重复单元中会有很多很多千克。

These are all polymers; huge chains or sometimes 3D networks of repeating organic units called monomers.

这些都是聚合物； 巨大的链条或有时称为单体的重复有机单元的 3D 网络。