老师让我们用简单的话来定义'友谊'这个词。

The teacher asked us to ___define the word 'friendship' in simple terms.

这份合同明确规定了双方的责任范围。

The contract clearly ___defines the scope of responsibilities for both parties.

清晰的线条勾勒出了建筑物的轮廓。

The clean lines ___defined the outline of the building.