Federal elections occur every two years, on the first Tuesday after the first Monday in November.
联邦选举每两年举行一次，在十一月的第一个周一之后的一天，也就是周二。
American has been studying this upgrade for more than two years and says it chose H-P after looking at every potential bidder and 15 airlines.
美国航空对这次系统升级已经研究了两年多时间，其表示，在对比每一家潜在的竞标者和15家航空公司之后选择了惠普。
After a couple of years, Robin Warren and I knew more about every aspect of ulcers than practically everyone in the world, because we read nothing else for two years.
几年以后，罗宾·沃伦和我比世界上任何人都知道更多关于胃溃疡的事情，因为两年内我们没有阅读其他任何东西。
After age 50, an exam every two years is recommended to search for, among other things, signs of age-related macular degeneration, a leading cause of blindness in older people.
此外，医生还建议在五十岁以后每两年检查一次眼睛，寻找与年龄相关的、能导致老年人失明的视网膜黄斑性病变信号。
The processing power of chips doubles about every two years, according to Moore's law, named after Gordon Moore, a co-founder of Intel, the world's biggest chip company.
根据摩尔定律（由世界上最大的芯片公司----因特尔的创立者之一-----格登•摩尔而命名），芯片的处理功能每两年就能升级两倍。
Inauguration Day occurs once every four years, about two and a half months after the national election.
就职日发生每四年一次，约两个半月后的全国选举。
Among them, the car with compressed natural gas cylinders for the first time test, a second test for three years, after the second inspection once every two years.
其中，车用压缩天然气钢瓶的首次检验、第二次检验为三年一次，第二次检验后每二年进行一次。
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。
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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