Language Point 3

Social scientists and economists, farming experts and environmentalists pose this question ...(Para. 1)

expert: n. specialist

She is an expert in/at teaching children.

她是儿童教育专家。

We respect his skill because he is an expert at his work.

我们尊重他的技术，因为他是那个行当的专家。

pose: 1. vt. ask

He posed a difficult question to me.

他问了我一个很难的问题。

2. vi. stand or sit in a particular position to be drawn, photographed, etc.

She was employed by the art school to pose for student artists.

这个艺术学校雇她给学生做模特。