Language Point 11
Factors affecting general health... (Para. 4)
factor: influence that helps to produce a result
His friendly way is a factor in his rapid success.
他待人友善是他很快获得成功的因素。
Hard work is an important factor in success.
勤奋是成功的重要因素。
What factors are responsible for a decreased population?
人口减少的原因是什么?