我认为这是一个严重的挑战。

And I think this is a serious challenge.

youdao

我认为这是一个大的挑战。

I think it's the big challenge.

youdao

据此我认为这是一个更大的挑战，是的，很可能比阿富汗更棘手。

I think for all those reasons it's a deep challenge, and yeah, probably harder than Afghanistan.

youdao

我认为这是一个极大的挑战。

I view it as a great challenge.

youdao

我认为这是一个巨大的挑战。

I think it's a great challenge.

youdao

我认为这是一个真正的挑战。

And I think it's a real challenge.

youdao

我认为这是一个很好的机会和对我的挑战。

I think it is a good opportunity and challenge for me.

youdao

我认为这是一个很好的机会和对我的挑战。

I think it is a good opportunity and challenge for me.

youdao