If you find the winter months tough, particularly during December and January you may suffer from Seasonal Affective Disorder, which causes a low mood caused by the lack of light during winter.

如果你觉得冬天很难熬，特别是在十二月和一月份，那么你可能患上了‘季节性情绪失调’，这是由于冬日里缺少阳光而引起的情绪低落。

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It has seen bigger percentage drops only twice in the past ten years, in May 2010 and December 2003.

在过去十年中，只有两次跌幅百分比更大，分别是在2010年5月和2003年12月。

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Significantly, Japan overtook China as the biggest foreign holder of US Treasuries in December, and its monthly purchases have been consistently rising since May.

值得注意的是，去年12月，日本超过中国，成为美国国债最大的海外持有者，而且自去年5月以来，日本的月度购买量一直在增加。

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That could have shed new light on those behind the bombing and what warnings the West may have had that such an attack could be a possibility back in December 1988.

VOA: standard.2009.08.24

Even more shares become eligible for sale in December and May.

FORBES: Move up http://i.forbesimg.com t Move down

Between December 2010 and May 2011, members of Internet Feds similarly waged a deliberate campaign of online destruction, intimidation, and criminality.

ENGADGET: Top LulzSec members arrested, group leader reportedly acted as informant

Gold bottomed in this region in September and December 2011 and then again in May of last year, and the yellow metal has been no lower ever since it hit its record high in the early part of September 2011.

FORBES: FOCUS: Technicians Eyeing Key Upside, Downside Chart Levels In Comex Gold