购物时进行价格比较能帮你省下不少钱。

Making a ___comparison of prices while shopping can save you a lot of money.

老师让我们做一个关于两种文化差异的对比分析。

The teacher asked us to make a ___comparison between the differences of two cultures.

这两款手机的屏幕质量根本没有可比性。

There's no ___comparison between the screen quality of these two phones.