1.recur的意思是“再发生”“重现”,即某事物以多少有规律的间隔再次发生或在记忆中的浮现,这些事物包括:以前发生的事、经历的事、知道的事、记在心里的事和对某人/物有影响的事等。
2.recur是不及物动词,常跟介词to连用。
3.recur的过去式和过去分词均为recurred。

recur to (v.+prep.)
▲recur to sb/sth
1.重提(先前的事) return in thought or consideration to (an earlier point)
Let us recur to what was said in this morning's meeting.让我们回到今天上午会议上所说的事情上来。
He recurred to the matter of cost.他又重新提出费用问题。
2.重新浮现 (of a memory) to return to (sb's mind)
Pleasant thoughts of my childhood recurred to me as I listened to the gentle music.当我听到这柔和的音乐时,童年时的美好回忆便浮现在我的脑海中。
The good times of my college days frequently recur to me.我经常想起大学时代的美好时光。
Old memories constantly recurred to me.往事经常浮现在我的脑海里。
The thought of a trip round the world has often recurred to my mind.作一次环球旅行的想法经常在我的脑海中出现。
3.借助于 make use of sth helpful
The nation may have to recur to unusual methods of controlling rising prices.这个国家不得不借助特殊手段来控制日益上涨的物价。

用作不及物动词
▲S+～(+A)
If the pain recurs, take this medicine.如果再疼就吃这药。
Leap year recurs every four years.闰年每四年出现一次。
Certain fevers recur at regular intervals.有些发烧症状会周期性反复出现。
It was a phrase that was to recur again and again.这是一个会反复出现的短语。