那趟旅行是我们两人难以忘怀的经历。

The trip had been unforgettable experience for both of us.

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说真的，她相当豪爽，让人难以忘怀。

To say the very least she is an expansive personality who is not easily forgotten.

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2007年最让人难以忘怀的中国纪录片！

The most unforgettable Chinese documentary in 2007!

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在平时的生活中，我们的英语生活也是最丰富最精彩也是最让人难以忘怀的。

In our everyday life, we held kinds of English activities which are very unforgetful.

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有些人，他们的脸你永远难以忘怀。

There are some people whose faces you can never forget.

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有些人，他们的脸你永远难以忘怀。

There are some people whose faces you can never forget.

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