1.career n.生涯；职业；事业
job 可以替换
2. fight v. 与……打仗，与……斗争
fought 过去式
fight for
fight against
4. ability n.能力；能耐；才能
Different people have different abilities.
5.harmful adj.有害的；能造成损害的
Be harmful to 对……有害
be harmful to=do harm to
Staying up late is harmful to your health.
The ability can also be harmful.
Staying up late does harm to your health.
Mum, why can't I play computer games every day?
——Playing computer games is harmful to your eyes.
Eating too much is harmful to our health.
