Protesters held rallies in cities across Pakistan, but much of the attention was focused on groups of lawyers and political activists in Karachi and Quetta, who officially started the so-called 'long march' to Islamabad.

VOA: standard.2009.03.12

This semester has started,officially today.

今天是本学期正式开学的第一天。

哈佛公开课 - 幸福课课程节选