The structure around the car is made from natural plant fibers and potatoes.

VOA: special.2009.11.03

They will reform their natural structure, and for DNA that means forming double helixes.

它们将重新形成原本的结构,对于DNA来说,就是重新形成DNA双螺旋

耶鲁公开课 - 生物医学工程探索课程节选

The reason it is so exciting that it's a protein, and it's a protein, this is the structure here, it's a ribbon structure so you can kind of see what it looks like, it's made up of all natural amino acids.

它这么让人激动的原因是因为它是一个蛋白质，这里的这个结构，这是个带状机构，你可以看到它的样子，它全部是由氨基酸组成的。

麻省理工公开课 - 化学原理课程节选

But the tribal structure of Israelite society that would develop would be strengthened by the natural division of the land into these separate geographical areas that only reinforced the tribalization of society. And these local tribes probably did assimilate elements of the local population.

但是以色列社会的部落形态却会发展,被不断地加强,因为土地自然划分为分离的地理区域,这加强了社会的部落化，这些当地的部落,很可能同化了当地人口的特点。

耶鲁公开课 - 旧约导论课程节选