片语
to run into碰撞,撞
bump up against difficulties碰到困难
C bump my head against把头撞到
Bump against a hammer撞锤
bump against a tree突然撞在树上
to hit打击,撞
bump against a wall撞到墻上
bump against the door撞在门上
bump against ten numbers multiplication撞十数乘法
run bump against the wall突然撞到墻上
bump up against碰到阻碍