knock into 撞上
bump into 偶遇；撞到
run into 撞见；碰上
collide with 与…相撞
brush against 擦碰
hit against 碰击
knock over 撞倒
1. I knocked up against the table in the dark.
我在黑暗中不小心撞到了桌子。
2. She knocked up against a chair while walking through the room.
她走过房间时撞到了椅子。
3. The boy knocked up against the wall and dropped his books.
男孩撞到墙上，书掉了下来。
4. We kept knocking up against obstacles during the project.
我们在项目过程中不断遇到障碍。
A: I knocked up against something in the hallway last night.
A：昨晚我在走廊里撞到了什么东西。
B: Be careful, it was very dark there.
B：小心点，那边当时很黑。
1) 指走路或移动时不小心撞到物体或障碍物
2) 可表示在过程中遇到意外阻碍或困难（较少用）
3) 强调无意的碰触或轻微碰撞动作
1. 不小心撞上（某物）
e.g.
He knocked up against the door in the dark.
他在黑暗中撞到了门。
2. 轻微碰撞到某物或某人
e.g.
She knocked up against a stranger in the crowd.
她在人群中碰到了一个陌生人。
verb (phrasal verb)
1. to accidentally hit or collide with something while moving.
Synonym: bump into, collide with