你走了以后，这里发生了巨大变化。

Great changes have taken place since you left.

youdao

自从他离开以来这里发生了巨大变化。

Great changes have taken place here since he left.

youdao

自从2000年以来，这里发生了巨大变化。

Great changes have taken place here since 2000.

youdao

可现在许多国家的留学生来我们这里，中国已经发生了巨大变化。

Now, I see many students from other countries coming to China to study.

youdao

可现在许多国家的留学生来我们这里，中国已经发生了巨大变化。

Now, I see many students from other countries coming to China to study.

youdao