She is sullen without reason today.

她今天无缘无故地闷闷不乐。

The sky is sullen just like my mood.

天空就像我的心情一样阴沉。

The sullen sky seems to rain.

乌云密布的天空看起来要下雨了。

She looked up at the sullen sky and shuddered.

她抬头看了看阴沉沉的天空 不由打了个冷颤

She gave him a sullen glare.

她满脸不高兴地瞪了他一眼。

Bob looked pale and sullen.

鲍勃脸色苍白，闷闷不乐。

The offenders lapsed into a sullen silence.

这些罪犯陷入了愤懑的沉默。

By his smile, I knew that sullen hall; by his dead smile, I knew we stood in hell.

看着他的笑，我想起了阴沉的礼堂；看着他死亡般的笑，我知道我们置身地狱。

He grew sullen, and began to swear.

他又不高兴了，开始咒骂起来。