It's a hard work, so you must work hard.

这是一件艰苦的工作，因此你必须努力去做。

youdao

He's too sick, so you must come or he will die, I'm afraid.

他病得很重，所以你必须来，否则我担心他会死。

youdao

It isn't like a duck to water to learn a foreign language, so you must work hard.

学习一门外语不像鸭子会游泳那么简单，必须努力才行。

youdao

"These regimes then turn to the U.S.and say, 'Well,the only alternative to us is the Islamists, so you must support us.'

VOA: standard.2010.05.19

So, you must imagine these are successive kings who are being buried in this, what must have been, sacred soil.

因此,你必须设想他们是被埋葬在,这块圣土中的历任国王

耶鲁公开课 - 古希腊历史简介课程节选

Aha! So to study and grasp things about dead bodies, corpses, you must yourself be a dead body.

所以为了研究并掌握关于尸体的知识,你自己必须先是一具死尸

耶鲁公开课 - 死亡课程节选

My son has Down Syndrome, so you must understand, status quo to me is completely unacceptable.

FORBES: Lowe's Ramps Up Disability Inclusion

So you must call your bank, mutual fund, brokerage house or credit union and ask.

FORBES: Magazine Article

How everyone winds up in Neverland is a secret worth waiting for, so you must wait.

WSJ: Neverland on SyFy; I Hate My Teenage Daughter on Fox: Television Reviews by Nancy deWolf Smith