It is difficult to convey the sheer complexity of the situation.

很难说势究竟有多复杂。

At last the climbers succeeded in conquering the difficult mountain.

登山队员们终于成功地征服了这座难以攀登的山峰。

We tried to console her when her mother died but it was very difficult.

"她母亲去世时我们设法安慰她,但很难奏效。"

It is difficult to reach a consensus about electoral reform.

要就选举改革达成共识很困难。

It's difficult to conceive of traveling to the moon.

难以想象到月球旅行会是什么样子。

It is difficult for a small grocery store to compete with a supermarket.

小商店很难超市抗争。

The world’s coldest continent, and the most difficult to reach, is Antarctica.

世界上最寒冷的和最难以到达的洲是南极洲。

The young surgeon contemplated the difficult operation of kidney transplant.

年青的外科医生为肾移植这一棘手的手术苦思冥想。

It is a difficult task to parallelize the existing sequential algor ithm.

对已有的串行算法进行并行化，是一项很困难的工作。

At high altitudes it is difficult to breathe.

在海拔高的地方会感到呼吸困难。

It is difficult to dissociate the man from his position.

一想到这个人, 就很难不联想起他的职位。

Without corroboration from forensic tests,it will be difficult to prove that the suspect is guilty.

没有法医化验的确证就很难证明嫌疑犯有罪。

This topic is peculiarly difficult to write about.

这个题目特别难写。

The students soon caught on to the idea that phrasal verbs are not really difficult.

学生们很快就明白到短语动词其实并不难。

PE teaching to the punily community is the very difficult part in colleges.

高校体育弱势群体的体育教育工作是体育教育领域的1个难点。

It is difficult to get rid of insects.

除掉虫子可不容易。

Birth rates are notoriously difficult to predict.

众所周知，出生率是很难预测的。

It is difficult to relate the two cases.

要把那两件事联系起来是很困难的。

It is difficult to relate his argument to the facts.

很难把他的论证同事实联系起来。

He reflected how difficult it would be to escape.

他在考虑逃走会有多大困难。