He thought for a while as though weighing my words.

他思考了一会儿，仿佛在斟酌我的话。

I worked for a while as a laboratory assistant in a university and I did some teaching.

我在一所大学做过一段时间的实验室助理，也做过一些教学工作。

Desomorphine was actually patented in the US in 1932 and marketed for a while as a sedative and pain reliever.

Desomorphine 实际上于 1932 年在美国获得专利，并作为镇静剂和止痛剂销售了一段时间。