And this biobased film is cheaper and has better properties than the existing one, petroleum-based.

而且这种生物基薄膜比现有的石油基薄膜更便宜，性能也更好。

I'd like to leave you with one last form which is biobased, but this, I think, is like the ultimate thrift.

我想给你们留下最后一种形式， 它是基于生物的，但我认为，这就像是终极节俭。