大学英语：live（v.）-lively

　　1. live（v.）-lively（adj.活泼的）

　　2. 倒装句：hardworking as they are. 此处的as表示although或though，尽管的意思，但用as时，需要把形容词或副词放在句首+as+顺状语序。该句话翻译成：尽管他们很努力工作。E.g. Although I love you much， I still can't help you. 可以转换成：Much as I love you， I still can't help you. E.g. Though this movie is very moving， I still can't afford time to see it. 可以转换成：Moving as this movie is， I still can't afford time to see it.

　　3. sober冷静的/严肃的；其比较级是 more sober

　　4. could have done/could have been done  本可以做或被做的事而没有做。

　　could not have done/could not have been done  本不可能做或被做的事而作了

　　5. 主语+is not long in doing sth  做某事不会花很长时间