recursive tree

recur

　 核心词汇 　

英 [rɪ'kɜː(r)] 　 　  美 [rɪ'kɜːr] 　 　

• vi.重现；再发生

名词: recurrence 过去式: recurred 过去分词: recurred 现在分词: recurring 第三人称单数: recurs

Verb:

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"

用作不及物动词 (vi.)

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。

recursion

　 畅通词汇 　

英 [rɪ'kɜːʃn] 　 　  美 [rɪ'kɜːrʃn] 　 　

• n.循环；[数]递归

Noun:

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

用作名词 (n.)

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

descend

　 常用词汇 　

英 [dɪ'send] 　 　  美 [dɪ'send] 　 　

• v.下降；降临
• v.传下来；遗传
• v.突然袭击；突然拜访

形容词: descendible 过去式: descended 过去分词: descended 现在分词: descending 第三人称单数: descends

Verb:

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"

用作动词 (v.)

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

descend, drop, fall, sink

这四个词都可表示物体向下降落。它们之间的区别是:

1.sink指在空气或水中垂直下降、下沉; descend则通常指沿斜线或斜坡下降; 而drop与fall均可指急速地向下坠落,可直可斜。例如:

The walk descends sharply.小路下倾得很厉害。

The ship struck against the rocks and sank.那船触礁沉没了。

We saw an apple falling〔dropping〕 down from the tree yesterday.昨天我们看见一个苹果从树上掉下来。

2.drop指物体由于重力从高处往下落; fall指物体由于不明原因或物体本身失去平衡而向下降落,有自然下落的意思。例如:

She dropped the cup.她把杯子弄掉了。

Leaves fall in autumn.秋天树叶下落。

3.drop通常是有意识、有目的地下落; 而fall则往往是无意识地下落。例如:

The enemy planes dropped bombs.敌机投下了炸弹。

Rain is falling fast.雨下得很大。

4.drop引申可表示物价的降落; sink还可指精力或意识逐渐丧失。例如:

The price of oil has dropped sharply.石油价格暴跌。

His heart sank.他感到沮丧。

5.drop一般用作及物动词,偶尔也用作不及物动词; fall则通常用作不及物动词

iterate

　 畅通词汇 　

英 ['ɪtəreɪt] 　 　  美 ['ɪtəreɪt] 　 　

• v.反复说；重做；[计]迭代

Verb:

1. to say, state, or perform again;

   "She kept reiterating her request"
   

2. run or be performed again;

   "the function iterates"

过去式: iterated 过去分词: iterated 现在分词: iterating 第三人称单数: 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

　

英 [ɪtə'reɪtə] 　 　  美 [ɪtə'reɪtə] 　 　

• n.迭代程序

1. Iterator that can write but not read elements.
   只能写不能读元素的迭代器。
2. WidthIterator uses Tree, implements stl iterator.
   最后，为使用这个框架，
3. These types are models of Forward Iterator.
   这些类型均为前向迭代器。
4. Returns : An iterator to the inserted element.
   返回:指向插入元素的迭代器。
5. Returns the range size of the iterator.
   获得迭代器的范围大小。