The last couple of years have been difficult.
最近的几年一直是困难重重。
The last 12 months have been difficult ones for local radio.
最近的12个月对地方广播电台来说是艰难的。
这一定是非常难受的。
Reducing demand has been difficult.
事实证明，降低需求非常困难。
这是不是很困难？
Demonstrating that has been difficult.
证明这些是很困难的。
The past six months have been difficult.
过去的六个月真是太艰难了。
I understand that the talks have been difficult.
我知道，谈判是艰难的。
He said the negotiations have been difficult.
他说谈判一直非常艰难。
It's been difficult to concentrate on my essay.
我很难集中精力写我的论文。
Has not been difficult, then does not have attains.
没有艰辛，便无所得。
Indeed, pain and itch have been difficult to separate.
实际上，疼痛和瘙痒一直以来都很难分开。
Even within New York City, travel has been difficult.
即使在纽约市里，出门也很困难。
Thee perfect body has always been difficult to obtain.
完美的身材总是很难拥有。
There have been difficult moments with United, though.
在曼联也有艰难时刻。
Leaving him in the CEO's chair would have been difficult too.
本来就很难把他留在总裁的位子上了。
It has been difficult to gauge the human impact of the accident.
这次事故对人类的影响难以估量。
An answer to the first of these has been difficult to obtain.
关于第一问题的答案是很难获得的。
The position of women in the Arab world has long been difficult.
妇女在阿拉伯世界中的地位长期以来一直无足轻重。
The problem of individual variability has always been difficult .
个体间的差异问题总是很难办。
Individually, these companies have been difficult to reach and monetize.
单独而言，它们很难触及这些企业开展业务并从中赢利。
That must have been difficult for her. She must have been very sad.
那对她来说肯定很难。她肯定很伤心。
But they insist that is not the case and the decision has been difficult.
但是她们坚称，不是这么一回事，这是个艰难的选择。
Concurrent programming has always been difficult and continues to be difficult.
并发编程总是很有难度，而且一直会很难。
But it has been difficult to pin down the exact relationships between them.
但要准确定义它们之间的关系还是有困难。
It must have been difficult to go through life immersed in paranoia and fear.
把一生都沉浸在偏执和恐惧里一定是很难熬的。
That requires industry-wide cooperation, which has been difficult to achieve.
这要求整个行业进行协作，但通常很难办到。
While for middle school students, vocabulary learning has always been difficult.
然而对中学生来说词汇学习一直是一个难点。
While for middle school students, vocabulary learning has always been difficult.
然而对中学生来说词汇学习一直是一个难点。
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