1. happen or occur again;

   "This is a recurring story"

2. return in thought or speech to something

3. have recourse to;

   "The government resorted to rationing meat"

1. The best way to ensure quality is to write tests that validate data and algorithms and verify that prior mistakes do not recur.
   确保质量的最佳方法是编写验证数据和算法并确认以前的错误不再重现的测试。
2. Our patient was successfully treated with diuretics, and the chylothorax did not recur during the following 12 months under a sodium-restricted diet.
   此病患成功地以利尿剂治疗且合并低钠饮食的控制下，经一年的追踪，乳糜胸并未再发生。

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。

1. (mathematics) an expression such that each term is generated by repeating a particular mathematical operation

1. This is the reason why we use recursion.
   但递归方法更优雅，能更好地反映问题的本质。
2. In order to construct a tree, the first thing you should think of is recursion.
   为了构造一个树，第一件你该想的事情就是递归

1. move downward and lower, but not necessarily all the way;

   "The temperature is going down"

   "The barometer is falling"
   "The curtain fell on the diva"
   "Her hand went up and then fell again"

2. come from; be connected by a relationship of blood, for example;

   "She was descended from an old Italian noble family"

   "he comes from humble origins"

3. do something that one considers to be below one's dignity

4. come as if by falling;

   "Night fell"

   "Silence fell"

1. The sun descended behind the hills.
   太阳下山了。
2. I wish that the prices can descend.
   但愿物价会下降。
3. I didn't expect him to descend to personal abuse.
   我没料到他会堕落到对我进行人身攻击的地步。
4. The custom has descended to our day.
   这一习俗一直传到今天。
5. He is descended from Confucius.
   他是孔子的後裔。
6. Armed thieves descended on the helpless travelers.
   一群武装盗贼袭击了无依无靠的旅客。
7. My sister's family is descending on us this weekend.
   想不到我姐姐一家本周末要到我们这里来

1. to say, state, or perform again;

   "She kept reiterating her request"

2. run or be performed again;

   "the function iterates"

1. Let me iterate that we have absolutely no plans to increase taxation.
   让我再一次重申我们绝对没有增税的计划。

iterator