窍门 key (to a problem); know-how; knack; secret of success; skilful method 懂得窍门 know the ropes; 学习 ... 的窍门 learn the tricks of; 找窍门 try to find the key to a problem; try to get the knack of doing sth. 这里面有点窍门。 there's a knack in it
懂得 understand; know; grasp 懂得革命道理 understand revolutionary principles; 懂得最多的人, 说得最少。 who knows most says least