总是;必定
If you do something without fail, you always do it.
I go to the gym every Monday and Wednesday, without fail. 我每周一和周三必定去健身房。
This film always makes me smile, without fail.
She attended church every Sunday without fail.
I read his newspaper column, without fail, every Saturday.
Every week, without fail, he brings her flowers.
务必；一定
used to tell someone that they must do something
Be there at nine o'clock, without fail. 9点钟务必到那里。
They need to feed the animals every day, without fail.
We must, without fail, turn our country into a flourishing and democratic state.
The money must be paid by Friday, without fail.
I want you to give Paul this message, without fail.
See also: fail noun