A female dolphin has a baby every two to three years. She gives birth to the baby under water.
雌海豚每两至三年生一个孩子。她是在水下产婴的。
Pandas are notoriously fussy when it comes to finding mates. Females in the wild normally have a cub once every two to three years, and the fertility of captive giant pandas is even lower.
大熊猫寻找伴侣时非常挑剔，野生雌性大熊猫每隔两三年生一只幼仔，圈养大熊猫的繁殖率就更低了。
Most manufacturers recommend divers to have their diving watch pressure tested by an authorized service and repair facility annually or every two to three years and have the seals replaced.
大局部的制造商建议潜水员到授权机构停止潜水表压力测试并且每年或两到三年修缮一次潜水表的零件，以及改换密封件。
Turtles nest every two or three years, so for data to be useful, the program must survive long term.
海龟每两年或三年筑巢一次，若有获得有用的数据，该计划必须长期长期坚持。
Within two or three years it will be normal for City to be playing in the Champions League every year, so I hope we can be on a par and challenge the best clubs around the world.
在两到三年内，曼城队将能够在每个赛季都获得冠军联赛资格，所以我希望我们能达到高水平，并能挑战世界上最好的俱乐部。
That allows them to breed every two years instead of the usual three.
这使得它们每两年繁衍一次而不是通常所说的三年。
A friend who works for a large global company tells me that every day two to three hours are given over to them, but in 10 years she cannot remember a single useful one.
有一个在大型跨国公司工作的朋友告诉我，她每天在电话会议上要耗费两三个小时，但是她想不起10年来有哪一次是有用的。
Fall in love with you, hug you without demur, every two or three days to come to you, four no kiss you marry to you within five days, not separate for sixty years!
一见钟情爱上你，二话不说抱住你，三天两头来找你，四下无人亲亲你，五天之内娶到你，六十年内不分离！
Every year, my family goes with two or three other families (usually families we have known for many years) to sing Christmas carols at the local nursing home.
每年，我们全家都会和另外两三个家庭(通常这些家庭都与我们是世交)一同去当地的疗养院为住在那里的人唱圣诞颂歌。
Generally speaking, termite-eaten wire poles ought to be replaced every two or three years.
电杆被白蚁蛀蚀，一般两三年就要换一次。
It takes time to integrate every new technology, but my guess is it'll take two to three years for this to happen.
完善每一项新技术都需要时间，但是，我认为两至三年之后就会发生。
Should be the ball out to dry laundry re-use, each time after washing clothes. The proposed change once every two or three years.
应把洗衣球拿出来晾干再使用，每次洗完衣服后。建议每两三年更换一次。
Generally, actuators operate without a large amount of maintenance, as 46% report that they have to service actuators once every three or more years, and 29% said once per two years.
一般来说，执行机构的运作，没有大量的维修，因为46%报告说，他们要服务器每隔三年或三年以上，29%的人表示每二年一次。
El Ni? O, the periodic warming of the equatorial Pacific that induces storms and other climatic events, historically occurs once every three to seven years and lasts for up to two years.
厄尔尼诺是赤道附近的太平洋周期性变暖现象，引发风暴和其它气候事件，历史上每三至七年发生一次，持续时间可长达两年。
According to insiders introduction, Jia Jia was discharged after two or three years, every few days with a fever, suffering from pneumonia, was also suffering from tuberculosis, hepatitis b.
据知情人介绍，佳佳出院两三年后，三天两头感冒发烧、患肺炎、还患上肺结核、乙肝。
According to insiders introduction, Jia Jia was discharged after two or three years, every few days with a fever, suffering from pneumonia, was also suffering from tuberculosis, hepatitis b.
据知情人介绍，佳佳出院两三年后，三天两头感冒发烧、患肺炎、还患上肺结核、乙肝。
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