困难

这件事做起来很困难。

zhè jiàn shì zuò qǐ lái hěn kùn nán.

This work is very difficult.

工作中，我们遇到了很多困难。

gōng zuò zhōng, wǒ men yù dào le hěn duō kùn nan.

At work, we encountered many difficulties.

这个任务对我来说很困难。

zhè ge rèn wù duì wǒ lái shuō hěn kùn nan.

This task is difficult for me.