It was difficult to get a true picture of what was happening in Cuba.

VOA: special.2010.07.08

So I think that it's true that the economy is difficult and there is big challenge in front of us.

所以我觉得，目前的经济形势真的很困难，我们面临着很大的挑战。

事业就是挑战 - SpeakingMax英语口语达人

Determining Muse's true age is difficult because birth certificates are rare in Somalia,a country which has not had a functioning government for nearly two decades.

VOA: standard.2009.04.22