... win by a hair 以毫发之差险胜 by a single hair一点儿 to hang by a hair 千钧一发 ...
双语例句
1
The style also works as asingle knot - but by knotting the hair twice the effect is more interesting, and easier to secure.
这款发型只编一个发结也很不错——但给头发打两次结后产生的效果好，而且编法也不难。
2
As a Padawan, Ben adopted the ancient tradition of growing asingle braid of hair to indicate his status, despite the fact that this was not required by the modern Jedi Order.