narrowing nut

例句：

1. 1.The narrowing of the gap between rich and poor is a pressing issue in our society.
   贫富差距缩小是社会亟待解决的问题。
2. 2.He carefully selected the narrowing nuts for his experiment.
   他仔细挑选了窄粒坚果来实验。
3. 3.The narrowing of the forest was due to human activities.
   森林的狭窄化是由于人类活动造成的。