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The closing date for entries is December 31.

参赛作品提交的截止日期是12月31日。

《柯林斯英汉双解大词典》

Debt to gross book value was 46.6% on December 31, 2013.

2013年12月31日，债务与账面价值总额之比为46.6%。

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Iran has rejected the December 31 deadline set by the international community to accept a deal to enrich its uranium overseas.

VOA: standard.2010.01.04

The controversy started on December 31, when the Malaysian High Court allowed Roman Catholics to use "Allah" to refer to God.

VOA: standard.2010.02.24

The threat,made on December 31 in a message posted on an extremist Internet Web site, prompted the Naval Criminal Investigative Service to elevate the risk for all U.S.military and commercial ships sailing through an area stretching from Somalia to the Persian Gulf.

VOA: standard.2010.01.07

So, what happens to the old munis issued before December 31, 2011 if this bill passes?

FORBES: A Trial Balloon That Could Deflate The Muni Market Even Further

Logitech late Wednesday posted weaker-than-expected results for its fiscal third quarter ended December 31.

FORBES: Logitech Q3 Misses; To Divest Remote Controls, Other Lines

The new requirements are effective for tax years ending on or after December 31, 2011.

FORBES: IRS Proposes New Regulations for Submitting EITC Claims