Young adults would use paint in special cans to spray their "tag" on walls and train cars around the city.

VOA: special.2009.04.08

Well, up until probably ten years ago, this was the primary propellant in just about every kind of spray thing that we had, hairspray, everything.

好吧，直到大概十年前，作为主要推进剂,存在于我们的每一个喷射器里，发胶，以及一切。

麻省理工公开课 - 固态化学导论课程节选

Well, up until probably ten years ago, this was the primary propellant in just about every kind of spray thing that we had, hairspray, everything.

好吧，直到大概十年前，作为主要推进剂,存在于我们的每一个喷射器里，发胶，以及一切。

麻省理工公开课 - 固态化学导论课程节选