Don't hesitate to save your old versions.

保存旧版本的时候不要犹豫。

麻省理工公开课 - 计算机科学及编程导论课程节选

In Yeats people are always particulars who are fitted to types which are new versions of old identities that travel across time.

在他的诗歌里人总是特定的,某些类型，是穿越时间的,古老人物的现代化身。

耶鲁公开课 - 现代诗歌课程节选