“我不知道他们为什么离开，”他悲伤地说。

"I don't know why they left," he said dolefully.

《柯林斯英汉双解大词典》

为什么要悲伤？

WHY be miserable?

youdao

我感到悲伤，心痛，懊悔。为什么我不在他的身边？

I felt grief, pain and remorse, Why had I not been there for him?

youdao

每当我回想起那些时刻时，为什么让我如此悲伤？

Why does it make me so sad when I think back to that time?

youdao

如果它能让你幸福，那你究竟为什么这么悲伤？

If it makes you happy, then why the hell are you so sad?

youdao

为什么欢乐易与人分享，悲伤却只能独自品尝？

Why easy to share joy, sadness can only taste alone?

youdao

他为什么总是爱听悲伤的情歌呢？

Why is he always listening to sad love songs?

youdao

你为什么身处悲伤？

Why are you in sorrow?

youdao

我非常理解他的悲伤，甚至也明白他为什么把心绘成黑色的原因。

I could even understand why he had made his heart a dark color.

youdao

那么，你为什么还这么高兴地唱着歌呢？通常人们丢失了东西时总是很悲伤的。

Then why are you singing so gaily? Usually when somebody loses something, he is sad.

youdao

他为什么看起来如此悲伤？

Why does he appear so sad?

youdao

为什么我的人生必须充满着悲伤?。

Why must my life be filled with sorrow ?

youdao

为什么有时候会莫名的悲伤？

Why to meet occasionally ineffable sadness?

youdao

为什么数学书看上去这么悲伤？

Q. Why was the math book sad?

youdao

为什么这样悲伤？

Why thus sad?

youdao

为什么我们这么悲伤？

Why should I be so sad?

youdao

为什么这么悲伤，难道你不喜欢我的生活方式？

Why so sad? Don't you like my way of life?

youdao

那你为什么如此悲伤？

Why are you so sad then?

youdao

噢，你为什么那么悲伤，眼睛里闪着泪光。

Oh, why you look so sad? Tears are in your eyes.

youdao

我不知道为什么，但我真的没觉得悲伤。

I don't really know why, but I don't feel sad.

youdao

我不知道为什么，但我真的没觉得悲伤。

I don't really know why, but I don't feel sad.

youdao