I decided to leave just because I want a more challenging opprtunity.

我决定离开只是因为我想得到一个更具挑战性的机遇。

youdao

I feelvery sad to miss the opprtunity of meeting you and many others in the field of Functional Grammar.

失去与您和其他研究功能语法的同行们见面的机会，我深感遗憾。

youdao