一根头发的宽度 = 一个非常小的距离/宽度
[1]Enemy forces are within a hair's breadth of the city.
[2]We were a hair's breadth away from getting caught.(= we were almost caught)
[3]he management of Spearmint Rhino should be fully aware that they came within a hair's breadth of losing their licence.
[4]breadth 是独立单词...不是broad (也不是bread n(0_0)n) 演变来的!
(同义字:width ; wide变形而来)