难

At first I thought it is very difficult ,but I worked it out at last.

起初我认为它很难，最后我还是做出来了。

At first, I thought it difficult for me to sing this song

首先，我觉得唱这首歌对我来说有点难。

This sort of bug seems to happen at random which is very hard to track down.

这种程序错误似乎是随机产生的，并且也很难被跟踪到。

I said, I really had a hard time at the beginning.

我说，我真的有一个在一开始很难。

It is difficult for a Business to move into a new market at the best of times.

对于一个企业来说在一个适当的时机进入一个新的市场是很难的。

The language of central banking is convoluted at the best of times.

即便是在最理想的情况下，央行的措辞也是晦涩难解的。

We are in the middle of a big technological change, and when you live in a society that is at the cutting edge of that change , it is hard to predict.

我们生活在科技革新之中，当你生活在一个革新前沿的社会中时，这很难预料。

This is a difficult problem, at the same time it is very interesting.

这是个很难的问题，但却很有趣。

And at times that can be extremely difficult but, you know, you do it, he said.

虽然这真得很难，但是，你知道，你做到了。

It's difficult to describe the difference between the first and the second half of the game against Atalanta.

很难描述出对亚特兰大那场比赛上下比赛的不同之处。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。