effort/'efət $ -fərt/

n. physical or mental activity need to do sth

n. [C; U] 努力；艰难的尝试：[effort to do sth] He made an effort to finish the task on time. 他尽力按时完成工作。

◇It takes a lot of time and effort to learn the skill. 学会这项技术很费时间和气力。

◇without effort 不费力气

构词ef (= -ex) + fort （= force堡垒；加强）

同根 comfort

常犯错误

✗ his efforts of helping the poor

✓ his efforts to help the poor 他为帮助穷人所做的努力