He poked his head around the corner to check that nobody was coming.
他从转角处探出头来，查看有没有人过来。
《牛津词典》
2
I lost my balance and hit my head on the corner of my coffee table and then on the floor.
我失去了平衡并且头撞到了我的咖啡桌的桌角，然后头撞到地板上。
3
Unto you therefore which believe he is precious: but unto them which be disobedient, the stone which the builders disallowed, the same is made the head of the corner.