In the East, one storm dropped lots of snow on communities from North Carolina to the New England states on the weekend before Christmas.

VOA: special.2010.01.05

So, don't forget to study this weekend and get those extra practice problems from the course website.

那么，这周末不要忘了复习,那些额外的习题可以在课程的网站上找到。

麻省理工公开课 - 化学原理课程节选

So, don't forget to study this weekend and get those extra practice problems from the course website.

那么，这周末不要忘了复习,那些额外的习题可以在课程的网站上找到。

麻省理工公开课 - 化学原理课程节选