TPO 13 聽力 lecture2 - 英檢

TPO 13
Lecture 2 講有關於ecological system
第16題
Why does the proffesor say this?
A) To point out that some terms have different meanings in other fields
D) To clarify a term used in biology

教授說的 (用""表示)
"The term keystone kind of explains itself. In architectute, a keystone in
an archway or doorway is the stone that holds the whole thing together and
keeps it from collapsing." Well, that's what a keystone species does in an
ecosystem.

答案是D 我選的是A 反覆聽幾次還是不解...

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