英特网的使用是一个划时代的事件。

The use of Internet is an epoch-making event.

youdao

尽管有了本周的这件划时代的事件，批判者还是抨击理查德爵士，说太空船只是挨到了太空的边，并未进入轨道。

Despite this week's milestone, critics will continue to snipe that Sir Richard's spaceship goes only to the edge of space and not into orbit.

youdao

为什么要如此做呢，莫非是要写关于19世纪划时代事件的学位论文不成？

Why would you, unless you're writing your dissertation on epochal events in the 19th century?

youdao