重点讲解：
1. thanks to
幸亏；归因于；
eg. Thanks to her skilful handling of the affair, the problem was averted.
多亏她对事情处理得巧妙，才避免了麻烦=fAa7G[RQN。
eg. The play succeeded thanks to fine acting by all the cast.
由于全体演员的出色表演，那出戏才获得成功-Q(1dB7.D2Y。
2. step up
增加（数量等）；提高（速度、强度等）；
eg. Vasodilators may step up the heart rate and cause headaches.
血管扩张神经会加速心跳并引起头痛Xr#uUs8Rj56。
eg. In order to better use of international short-term capital, countries are beginning to step up monitoring.
为了更好的利用国际短期资本，各国都开始加强监管ug87x9Tstmjk]bIw。
3. for the first time
第一（次）的；首（次）的；
eg. For the first time in her life her talents had a fair field.
她有生以来第一次获得了充分发挥她才能的均等机会RDZU7w;6WD0B*PIiT。
eg. For the first time in months he was in the black at the bank.
几个月来他的银行户头上第一次有了盈余WcTh[R!H9R。