It is hard to say goodbye.

要说再见真的很难。

Yes, it is hard to say what you feel in the moment.

是的，你可能很难形容自己此刻的感受。

It is hard to say, but her Golden Globe win may improve her chances.

这很难说，但是赢得金球奖可能会为她提名奥斯卡增加几率。

It is harder to say how loudly they will burst - and which might still reflate.

很难说它们会以多大的声音破裂——以及哪些仍有可能再度膨胀。

A high-spec automaton powered by artificial intelligence (AI), he isn't quite human though it is hard to say why.

他是一个由人工智能(AI)驱动的高规格机器人，虽然很难说出原因，但他并不完全是人类。

As a result, he said, it is hard to say if the winter tornadoes are closely related to climate change.

因此，他说很难确定冬季龙卷风是否与气候变化密切相关。

It is hard to say how long people have been drinking wine.

很难说人们喝了多久的酒。

It is hard to say why humans like organized games.

人类为什么会喜欢有组织的竞技活动呢？

But it is hard to say how much of that is original and how much...Marmalade?

但是很难分清多少是原来的颜色，多少是......橘子酱？

In this sentence, it is hard to say that the direct object, the concert, is really receiving an action.

在这句话里，很难说直接宾语音乐会，真的是在接受一个动作。

The extent of his excesses is such that it is hard to say which detail most rankles Germans, and not only Catholic ones.

很难说是哪个细节激怒了德国人，但这个原因不只是来自天主教方面。

It is hard to say how much of that is directly related to Ring, but she said the devices do help to reduce crime.

很难说这与Ring公司有多少直接联系，但她认为这一设备的确有助于减少犯罪。

She said, with the available data, it is hard to say for sure whether these species lived side by side, or if the DNA was mixed together from different parts of the landscape.

她说，根据现有的数据，很难确定这些物种是比邻而居还是来自不同地区的DNA混合在一起。