这舞台的灯光效果不错。

Zhè wǔtái de dēngguāng xiàoguǒ búcuò.

The effect of the lighting on the stage is quite good.

这个药的效果很好。

Zhège yào de xiàoguǒ hěn hǎo.

This medicine works very well.

为了提高学习效果，老师让我们先预习课文。

Wèile tígāo xuéxí xiàoguǒ, lǎoshī ràng wǒmen xiān yùxí kèwén.

In order to improve learning effectiveness, the teacher lets us preview the text first.