We're short-staffed at the moment.So I have to do all the designing,executing as well as marketing.
我們現在人手不足。所以我一個人要兼顧設計，執行和市場的工作。
Oh, We can't have you pulling the cart all by yourself.You will burn out.
哦，可不能讓你一個人這么忙活，你會吃不消的。

Why do you bring Kenny back?You know we're archenemies.
你為什么把肯尼又請回來了？你知道我倆是宿敵。
Relax.We're a firm. We can't have you pulling the cart all by yourself all the time.
放松啦。咱們可是一個公司，不能讓你一個人做所有的事情吧。

精講部分

We can't have you do all the work.
We can't have you pulling the cart all by yourself.
pull the cart all by oneself字面意思為“獨自一個人拉著手推車”，引申開來就是“自己一個人挑大梁，承擔全部的責任”，即shoulder all the responsibilities by oneself,這是一個十分形象的比喻。那么“我們不能讓你一人做所有工作”也就是:We can't have you pulling the cart all by yourself。