她被派出国执行一项艰巨的任务 She was sent abroad on a difficult assignment. 为什么用on

问题描述:

她被派出国执行一项艰巨的任务 She was sent abroad on a difficult assignment. 为什么用on
可以翻译成其他吗,我要详细的回答,thank you!
on assignment 是词组吗

可以有N多种翻译,请看官审阅:
1 She was sent abroad to carry out an arduous work.
2 She was sent abroad on a difficult mission.
3 She has been charged with a difficult task abroad.
4 A quite difficult job has been assigned to her for her overseas mission.
5 She was dispatched abroad to execute a diffiult mission.
.