Confirming Mister Muse's true age is difficult because birth documents are rare in Somalia.

VOA: special.2009.04.25

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

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

VOA: special.2010.07.08

This is particularly true in difficult financial times, when cash is king.

FORBES: China Enters the Vineyard

They did their best to collect true numbers in difficult circumstances and with little money.

ECONOMIST: Good news on treatment. Bad news on propaganda

That makes it difficult for true independents to run.

ECONOMIST: Good sense in the local elections