例句
So, what I want to do is go back to this simple polymer configurational model that we introduced before.
那么,我想做的是回到,简单的聚合物构型模型,我们之前介绍过的。
Latex, a material obtained from rubber trees, is a natural polymer of isoprene.
乳胶,一种从橡树获得的物质,是天然的异戊二烯聚合物。