President Barack Obama has said that the United States will not "wait indefinitely" for a response from Iran over the U.N.draft nuclear deal.

VOA: standard.2009.12.18

Log n Log n, because at each stage I'm cutting the problem in half. So I start off with n then it's n n/2 n/4 n/8 over two n over four n over eight.

因为总共有多少层？,因为在每一层，我都是把问题分解成两半,因此以n开始，然后是。

麻省理工公开课 - 计算机科学及编程导论课程节选

One over two squared minus one over n squared 3 4 5 where n takes values three, four, five, six.

除以，2，的平方再减去1除以n的平方,将n赋值为。

麻省理工公开课 - 固态化学导论课程节选

In fact, some of the rebel factions, there are three rebel factions that fought in N'Djamena over the weekend - N'Djamena, the capital of Chad.

NPR: Chad Conflict Stirs Global Response

Security Council may take to push Tehran to comply with U.N. demands over its nuclear program.

CNN: Russian president denies Putin has all the power

Another proposal would give the U.N. authority over allocating Internet addresses.

WSJ: Crovitz: The U.N.'s Internet Power Grab