tall order

US /tɔl ˈɔr.dər/
UK /tɔl ˈɔr.dər/
"tall order" picture
1.

艱鉅的任務, 苛刻的要求

a request or task that is difficult to fulfill or achieve

:
Finishing this project by tomorrow is a tall order.
明天之前完成這個項目是個艱鉅的任務
Asking him to change his mind now is a tall order.
現在讓他改變主意是個艱鉅的任務