We use the expression to clown around when we talk about someone playing tricks and making jokes.

VOA: special.2009.01.11

The rest of the time I want to talk about expression of genes, of new genes.

剩下的时间里我想讲讲基因的表达,新基因的表达

耶鲁公开课 - 生物医学工程探索课程节选

The last thing I want to talk about today is control of gene expression.

今天我们要讨论的最后一个问题,是基因表达的调控

耶鲁公开课 - 生物医学工程探索课程节选

If you like, talk about what free expression means to you in your personal and professional life.

BBC: India #flashreads seeks to defend free speech

Despite all the talk of markets and freedom of expression, the market that the U.S. fears the most is the marketplace of ideas?

FORBES: Offensive Cyberwar Operations as Communication