无能

他太年轻，无法胜任这份工作。

tā tài qīngnián, wúfǎ shènrén zhè fēn gōngzuò.

He is too young to be able to handle this job.

她的能力有限，无法完成这个任务。

tā de nénglì xiànlìn, wúfǎ wánchéng zhège rènwù.

Her abilities are limited and she cannot complete this task.