Isn't it very difficult though?

可是这不是很困难吗？

At first it was very difficult.

起初非常困难。

Online shopping is very difficult.

网上购物非常困难。

Some of the maths is very difficult, says Mike.

迈克说，有些数学非常难。

Was your life very difficult when you were a kid?

你小时候生活很困难吗？

I know that it is very difficult to stop smoking.

我知道戒烟非常困难。

They are in danger and the situation is getting very difficult.

它们处于危险中，情况变得非常困难。

This exam is very difficult.

这次考试非常艰难。

This question is very difficult.

这个问题很难。

This math unit is very difficult.

这个数学单元很难。