不得要领: miss the point; be pointless; not see what sb. is driving at; beside the mark; cannot get the important point; fail to grasp the main points; make neither head nor tail of sth.; unable to
全然: completely; entirely 短语和例子全然不顾 give no thought to; 全然不计后果 in utter disregard of the consequences; 全然不同 entirely different; 全然不知 not to know beans; entire ignorance