So oxygen gets 3 pairs, and each chlorine gets 3 pairs, so now we're up to 9 pairs.

那么氧都有三对，每个氯有三对，那么现在我们用了九对了。

麻省理工公开课 - 化学原理课程节选

Now we'll play a passage of Mozart-- a symphony by Mozart here that he wrote at the ripe old age of nine years.

现在我们要放的这个片段来自莫扎特-,这首交响曲是莫扎特在九岁那年写的。

耶鲁公开课 - 聆听音乐课程节选