1795; Figurative use by 1841. Hair perhaps in reference to the slight pressure required to activate it.
The difference between a hair-trigger and a common trigger is this--the hair-trigger, when set, lets off the cock by the slightest touch, whereas the common trigger requires a considerable degree of force, and consequently is longer in its operation. [Charles James, "Military Dictionary," London, 1802]
双语例句
1. She walked forward and embraced him and stroked his tousled white hair.
她走上前拥抱他并轻抚他凌乱的白发。
来自柯林斯例句
2. Applying the dye can be messy, particularly on long hair.
涂抹染发剂可能会搞得一团糟，特别是长发。
来自柯林斯例句
3. His long, uncovered hair flew back in the wind.
