keeling

n.(船的)龙骨

v.(船)倾覆；突然倒下；出问题

The keel of the boat was made of steel. 这船的龙骨是钢制的。

The workers are laying a keel of the ship. 工人正在给那艘船安龙骨。

He must have drunk too much; when he tried to stand up, he keeled over. 他肯定是喝多了，当他要站起来时，却摔倒在地上。

My email system would keel over if I tried send that much data. 如果我想发送那么多的数据，我的电子系统就会出问题。