rise at a feather

• vi. 一碰就跳起来(一碰就冒火)

例句

用作不及物动词 (vi.)

1. A snail shrinks back at a touch.
   蜗牛一碰就缩回去了。
2. The big striker went down easily, but it was a penalty.
   这位强壮的射手一碰就倒，点球。