俄罗斯只有两个可托赖的盟友，就是他的军队和舰队， 七乐彩，这虽是老话然而是不问可知的真谛。

"Russia has only two reliable allies: its army and fleet": nobody abolished that old piece of truth. Well, maybe Hugo Chavez, Mahmoud Ahmadinejad and Raul Castro. But seriously, nobody.

youdao

我们应该明白，伟大的交响乐是用上帝给予全世界的七个简单的音符谱写成的。

We should appreciate that great symphonies were written from only seven simple notes that God gave the entire universe.

youdao

今年35岁的席因为没有找到女朋友，无法在乐衷于牵桥搭线的亲戚面前展示，决定与父母小聚后就呆在家里度过七天的假期。

Unable to find a girlfriend to parade in front of his matchmaking-obsessed relatives, Xi, 35, elected to stay at home after a brief celebration with his parents for this week-long holiday.

youdao

They tend to be just triads whereas in classical music we can have a triad but we can also add a seventh note with one,three,five,seven,nine,eleven, that kind of thing.

流行乐一般只用三和弦，但是古典乐可以用三和弦,也可以在上面加上七音，一，三，五，七，九，十一，诸如此类的。

耶鲁公开课 - 聆听音乐课程节选