每次听到这首歌，许多往事就涌上心头。

Měicì tīngdào zhè shǒu gē, xǔduō wǎngshì jiù yǒng shàng xīntóu.

Every time I hear this song, many past memories come flooding to mind.

他不愿意提起那段往事，那是一段痛苦的经历。

Tā bú yuànyì tíqǐ nà duàn wǎngshì, nà shì yī duàn tòngkǔ de jīnglì.

He is unwilling to bring up that past event; it was a painful experience.

老朋友见面，聊起了很多年少时的往事。

Lǎo péngyǒu jiànmiàn, liáoqǐ le hěnduō niánshào shí de wǎngshì.

When old friends meet, they talk about many things from their youth.