to a hair's breadth

She knew how to hit to a hair's-breadth that moment of evening when the light and the darkness are so evenly balanced that the constraint of day and the suspense of night neutralize each other, leaving absolute mental liberty.

她知道怎样抓住傍晚时分极短的那个时刻，那时候，光明和黑暗恰到好处地得到平衡，白昼的拘束和黑夜的紧张相互得到中和，留下来的只是心灵上的绝对自由。

The dollar fell to within a hair's breadth of its all-time low

美元差一点跌到了最低点。

The dollar fell to within a hair's breadth of its all-time low.

美元差一点跌到了最低点。

She has been telling me about her investment history since around 2000~ the time, not coincidentally, when the Bank of Japan first pushed interest rates down to within a hair's breadth of zero.

她向我讲述了自2000年以来她投资的经历。那时，日本央行首开先河将利率下调接近于零的水平，这并非偶然。

Their measurement are correct to a hair's breadth.

他们的测量非常精确,丝毫不差.