这些照片让我们见证着时代的变化。

Zhèxiē zhàopiàn ràng wǒmen jiànzhèng zhe shídài de biànhuà.

These photos let us witness how the times have changed.

这些都是我中学时代流行的漫画。

Zhèxiē dōu shì wǒ zhōngxué shídài liúxíng de mànhuà.

These are all comics that were popular when I was in middle school.

不同的时代有不同的潮流。

Bùtóng de shídài yǒu bùtóng de cháoliú.

Different eras have different trends.