Sometimes we may feel extremely sad when a friend has cheated us, for real friends should not be like that.

有时候，我们会因为被朋友欺骗了而感到特别伤心，因为真正的朋友不应该是这样子的。

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In these neutral times, when we are neither ecstatic nor extremely sad, the slightest change in attitude can swing our happiness balance drastically in either a positive or negative direction.

在这些不甜不苦的日子里，当我们既没有狂喜也没有极度悲伤，态度的细微变化就可以使你的快乐在积极与消极之间剧烈的摆动。

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I'm extremely sad and frustrated.

我非常伤心，也非常沮丧。

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So, hunger sets in and it becomes extremely sad and tragic, and attempts to break out simply don't work; but, it had its light moments, and I can never resist those.

饥饿来临,一切都变得如此悲惨,而尝试逃跑只是徒劳,但这其中也有些趣事发生,我对这些逸事总是没抵抗力

耶鲁公开课 - 1871年后的法国课程节选

The difference between the extremely happy people and extremely unhappy people is not that one gets sad, of upset, or anxious, or depressed; and the other does not.

极其快乐的人和极其不快乐的人,区别不是在于一个会伤心，难过，焦虑或抑郁;,而另一个不会。

哈佛公开课 - 幸福课课程节选

Rob Hunt, joint administrator at PwC, said it was an "extremely sad day for Jessops and its employees".

BBC: Jessops camera stores to close with loss of 1,370 jobs

Mayor of Axminster Andrew Moulding said it was "extremely sad and troubling news".

BBC: Axminster Carpets in administration talks

Holdsworth is extremely sad to see the youth team set-up fold but says he knows the club had no choice.

BBC: Mansfield Town manager David Holdsworth stays defiant