我们应避免仅凭外貌就对他人做出不公平的假设。

We should avoid making unfair ___assumptions about people based on their appearance.

这份预算预测是基于经济将保持稳定的假设。

The budget forecast is based on the ___assumption that the economy will remain stable.

在没有有力证据的情况下，挑战这一基本假设是危险的。

It's dangerous to challenge this fundamental ___assumption without strong evidence.