重點(diǎn)講解：
1. dedicate to 獻(xiàn)(身)；投(身)；致力；
Bessie has dedicated her life to caring for others.
貝茜一生都致力于照顧他人。
2. serve as 用作；可當(dāng)…使用；充當(dāng)；
He has also served as a prime minister and Supreme Court justice.
他也曾當(dāng)過(guò)總理和最高法院的大法官。
3. be determined to do sth. 下定決心的；決意的；堅(jiān)定的；
We are determined to get the work done before New Year's Day.
我們定下決心，要在元旦前完成這項(xiàng)工作。
4. tend to do sth. 往往會(huì)；經(jīng)常就；
We tend to make mistakes when we do things in a hurry.
忙中不免出錯(cuò)。