The edge must slice his thumb because his hand flies to his mouth, and he's sucking hard, eyes wide open.
纸片一定是划到他大拇指了,他的手里刻缩了回去,嘴用力吸着大拇指,瞪大双眼。
2
Furthermore, I made some errors of omission, sucking my thumb when new facts came in that should have caused me to re-examine my thinking and promptly take action.