You must knock on doors until your knuckles bleed.

你必须去敲一扇扇的门，直到指关节流血。

youdao

It drew strength from the not so-young people who braved the bitter cold and scorching heat to knock on doors of perfect strangers.

力量来自不是很年轻的人，他们冒着严寒酷暑，敲开陌生人的家门进行宣传。

youdao

His firm operates through a network of locals who knock on doors and pester their acquaintances to buy lipstick and shampoo. These salespeople also recruit other salespeople.

他的公司通过那些上门销售和劝说熟人购买口红和洗发香波的当地人网络来运作，这些销售人员也会雇用其他人销售。

youdao

Sign up with one of our volunteers here today to make phone calls, to knock on doors.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event -- Sterling, VA

There is a trip into Nevada you can do to knock on doors.

WHITEHOUSE: Remarks by the President at a Campaign Event

These are the people who man the phone banks and knock on doors.

ECONOMIST: The race is on in earnest, but his party's chances look grim