Serenade No. 13 in G major, K. 525, Eine kleine Nachtmusik: II. Romance.

莫扎特：G大调第十三小夜曲，K.525“一首小型夜曲”——浪漫曲。

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Ibuprofen had no obvious effect on articular cartilage degradation and decreasing the levels of matrix metalloproteinase 13 and cathepsin K.

布洛芬对软骨降解及基质金属蛋白酶13和组织蛋白酶k水平无明显影响。

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One hundred executives were American, and 20 to 50 participated from each of 13 other countries, including China, Russia, and the U. K.

接受调查的管理人员中有100人为美籍，另外还有来自中国、俄罗斯和英国等13个国家的人员，每个国家20-50人不等。

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And the higher ratings reflect the fact that hockey fans have been aching to see their beloved sport, coupled with the realization that the 2012-13 season is akin to a 400-meter sprint rather than a 5 K run.

FORBES: They Shoot, They Score: NHL Ratings, Secondary Prices Show Fans Not Deterred by Lockout

Now the SEC has proposed a list of 13 corporate events that it hopes to make 8-K-mandatory.

FORBES: Confidence Crisis, Business Boon

Even so, Carlsberg-Tetley holds only a modest 13% of the (stagnating) U.K. market and lacks strong connections to the pub business.

FORBES: A Beer That Lost Its Head