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1·I think he's happy. It's hard to tell.

我想他是幸福的。这很难说。《牛津词典》

2·It's hard to tell what effect this latest move will have.

很难说最近的这次行动将会有什么样的影响。《柯林斯英汉双解大词典》

3·The immediate future is clear, but it's hard to tell what lies beyond.

最近的将来已经明朗，但更往后就很难说了。《牛津词典》

4·This year, it was hard to tell whether my prize or the one chosen by my 14-year-old brother, Jason, was the winner.

今年，很难说是我得奖，还是我14岁的弟弟詹森选的那个得奖。

5·It's hard to tell.

这很难说。

6·It was hard to tell the difference between the two versions.

很难分辨出这两个版本有什么区别。《牛津词典》

7·Maybe it's really hard to tell someone that you are feeling sad or worried.

也许告诉别人你感到悲伤或担心真的很困难。

8·The twins are so alike that even their father finds it hard to tell them from each other.

这对双胞胎长得太像了，连他们的父亲都很难把他们区分开来。

9·Get into the habit of telling the truth, and you will find it really hard to tell a lie.

养成说真话的习惯，你就会发现说谎真的很难。

10·When scientist Thomas Bouchard Jr. invited the Jim twins to his lab, people there found it very hard to tell them apart.

当科学家小托马斯·布沙尔邀请吉姆双胞胎到他的实验室时，工作人员很难将兄弟俩区分开来。