我认为：必须把勤奋用在刀刃上。

I think that: must be hard with the knife's edge.

youdao

疏水阀一定要选用质量最好的产品，要把有限的资金用在刀刃上。

Traps must use the best quality products, limited funds should be used in the knife's edge .

youdao

公司可能在盈利，或者资本效率高，又或者将每分钱都用在刀刃上。

The company could be profitable, it could be capital efficient, or it could be crushing it.

youdao