重点讲解：
1. a series of 一连串；一系列；连续；接连；
The council has organised a series of events and competitions for school children in the area.
委员会为本地区的中小学生组织了一系列的活动和比赛mFCSPX%gSuT!7_zJm。
2. at the hands of 在…手中，从…那里（尤指受到不好的待遇）；
The civilian population were suffering greatly at the hands of the security forces.
老百姓吃尽了安全部队的苦头=K=J%XpXip,。
3. at least （数量）至少，不少于；
I could provide you with the addresses of at least three illegal drinking dens.
我可以为你提供至少3处非法饮酒窝点的地址2l2D+RgY*)9HQfz。
4. up to 高达；多达；
Up to twenty thousand students paid between five and six thousand dollars.
多达20,000名学生支付了5,000到6,000美元YWdUn0j9&I。