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1·Three fives are fifteen.

三个五等于十五。《牛津词典》

2·The talks began some fifteen minutes late.

商谈迟了约十五分钟才开始。《柯林斯英汉双解大词典》

3·We paid off our mortgage after fifteen years.

我们历经十五年的时间还清了抵押借款。《牛津词典》

4·In its heyday , the company ran trains every fifteen minutes.

公司在最兴隆时期每隔十五分钟就开出一列火车。《牛津词典》

5·We landed on a grass airstrip, fifteen minutes after leaving Mahe.

离开马赫岛十五分钟后，我们在一块草地临时飞机跑道上降落了。《柯林斯英汉双解大词典》

6·The wiring in your house should be renewed every ten to fifteen years.

你家里的电线应该每十到十五年更新一次。《牛津词典》

7·In those days most people left school when they were only fifteen years old.

那时候，大多数人上学只上到十五岁。《牛津词典》

8·He started beating me when I was about fifteen but I didn't do anything to provoke him.

我大约十五岁时，他开始打我，但我并没有做什么招惹他的事情。《柯林斯英汉双解大词典》

9·I looked and lo! every one of the fifteen men who had been standing with me had disappeared.

我一看，哎哟！原来那十五个和我站一起的家伙全没了踪影。《柯林斯英汉双解大词典》

10·Bob spent fifteen months alone on his yacht. Ann, meanwhile, took care of the children on her own.

鲍勃独自在他的游艇上待了十五个月。在这段时间，安一个人照顾孩子。《牛津词典》

十五

1·Three fives are fifteen.

三个五等于十五。《牛津词典》

2·The talks began some fifteen minutes late.

商谈迟了约十五分钟才开始。《柯林斯英汉双解大词典》

3·We paid off our mortgage after fifteen years.

我们历经十五年的时间还清了抵押借款。《牛津词典》

4·In its heyday , the company ran trains every fifteen minutes.

公司在最兴隆时期每隔十五分钟就开出一列火车。《牛津词典》

5·We landed on a grass airstrip, fifteen minutes after leaving Mahe.

离开马赫岛十五分钟后，我们在一块草地临时飞机跑道上降落了。《柯林斯英汉双解大词典》

十五个

1·All fifteen boys pick up their textbooks and thump their diminutive desks as they yell out each letter in unison.

十五个男孩都拿起他们的课本，边敲着小课桌，边整齐大声地读出每一个字母。

2·Now Ziba had fifteen sons and twenty servants.

洗巴有十五个儿子，二十个仆人。

3·The project involves fifteen developers and testers, separated into two teams, respectively.

这个项目包括十五个开发人员和测试人员，各自分成两个团队。

4·There are seven of you, there are fifteen of us.

你们是七个，我们是十五个。

5·It's best to answer fifteen questions or fewer every iteration (every two weeks, for example).

最好在每次迭代中询问十五个或更少的问题(举例来说，每两周)。

(1)fifteen minutes15分钟