A leap second is an extra second added to the last day of the month of March, June, October or December which means that the last minute in the day for that month has more than 60 seconds.
闰秒是向3、6、10或12月的最后一天添加的1秒，这意味着该月份的最后一天的最后一分钟不止60秒。
The second meeting of these two inspirational planets will take place July 10, and the third, December 21.
这两颗充满灵感的行星的第二次相遇将发生在7月10日，第三次在12月21日。
This is the time of year - second only to December, maybe - when we're reminded how much kids cost.
每年的这个时间——下次要到12月，也许——提醒着我们为孩子们花了多少。
As the graph below shows, the polio burden fell by 92 percent between the first and second halves of 2009, from 360 confirmed cases between January and June to 28 cases between July and December.
如下图所示，2009年下半年，骨髓灰质炎病例比上半年下降了92%，确认病例从1 -6月的360例减少到7- 12月的28例。
On DECEMBER 16th 1811, the residents of New Madrid, Missouri, were startled out of their beds by a huge earthquake, which was quickly followed by a second.
1811年12月16日，美国密苏里州新马德里的居民在睡梦中被强烈地震惊醒，没多久又发生了一次很强烈的地震。
American employers shed more than half a million jobs in December, bringing the total number of jobs lost in 2008 to 2.6m, the most since the end of the second world war.
12月，美国企业裁员超过50万人，使2008年失业人口总数增加到260万人，达到二战结束以来的最高水平。
The first part of the Hobbit is scheduled for release in December 2011, with the second half to follow a year later.
《霍比特人》第一部计划于2011年12月上映，第二部将于次年上映。
For these reasons, Provo tied for second-to-last inisland rankings published in the November/December 2007 issue of themagazine.
由于这些原因，普罗伏在此榜单上位列倒数第二。
This is the second Spring Festival permitting Beijing residents to light fireworks within the Fifth Ring Road of the city after a 12-year ban was lifted in December 2005.
这是经过了12年的禁令之后，居住在5环以内的北京市民自2005年以来第二次允许在春节期间燃放鞭炮。
Fido is planning to launch the BlackBerry 8120 Pearl in both Oyster Pink and Grey on second week of December.
菲计划推出两牡蛎粉红色和灰色的12月第二周的黑莓8120珍珠。
Today is one of great importance to you all, and we are pleased that so many of you are participating in 11.11.11. that is only second to the 21st. December 2012.
今天对你们所有人来说都是具有重要意义的一天，我们非常的开心看到这么多的人参与到11-11-11中，第二个重要日期就只是2012年12月21日。
The school year is divided into two semesters [si 'mest?], the first of which is September through December, and the second January thought May.
一学年分为两学期，第一学年从九月到十二月，第二学期从一月到五月。
Beginning the second week of December, OTIS will be subjected to rigorous acoustic testing to further simulate launch conditions.
从12月的第二周开始，OT IS将进行严格的声学测试，以进一步模拟发射条件。
The work selects the second exhibition with big popular calligraphy of Chinese today art museum December.
十二月作品入选中国今日美术馆第二届流行书法大展。
The school year is divided into two semesters, the first of which is September through December, and the second January through May.
一学年分为两个学期，第一学期是从九月份到十二月份，第二学期是从一月份到五月份。
One, the second-biggest ever recorded, ripped the seafloor just west of Sumatra, Indonesia, in December 2004 and unleashed a tsunami that caused destruction across the entire Indian Ocean basin.
一个是历史上记录的第二大的地震，即2004年12月正好发生在印尼苏门答腊岛以西的海底断裂，并且引发的海啸给整个印度洋海洋深处造成巨大破坏。
The second ship of the two Project 956 Sovremenny class destroyers ordered in 1997, Fuzhou (137), was delivered in December 2000.
二艘现代级956型驱逐舰的第二艘在1997年进入序列，“福州”号（137）在2000年12月交付。
The second ship of the two Project 956 Sovremenny class destroyers ordered in 1997, Fuzhou (137), was delivered in December 2000.
二艘现代级956型驱逐舰的第二艘在1997年进入序列，“福州”号（137）在2000年12月交付。
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