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。