重点讲解:
1. be unique to 独有的;特有的;
例句:The custom is unique to the region.
这种风俗是这一地区特有的 。
2. be based on 以…为基础;
例句:The book is based on personal experience.
本书是以个人经历为基础的 。
3. even if 即使;尽管;纵然;
例句:Even if you failed again, you shouldn't give up.
即使你再次失败,你也不应放弃 。
4. share with 共享;共有;合用;
例句:He shared with his friends in distress.
他和朋友共患难 。
adv. 先前,在此之前