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。
用作动词 (v.)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。
n.(=keelman)驳船船员；用来测量液体的容器
adj.[船]备有龙骨的
v.使爬进船底；严责
n.入港税；停泊税
