He gave an unnatural smile (= that did not seem genuine) .

Her leg was bent at an unnatural angle.

她的腿弯曲的角度反常。

His eyes were unnaturally bright.

他的眼睛异常明亮。

Her voice was a little strained, a little unnatural.

她问,声音有点紧张, 有点不自然.

When his lies were exposed, his expression was very unnatural.

被戳穿谎言之后, 他的脸部表情异常地不自然.

Her hair was an unnatural orange.

她的头发是非天然的橘黄色。

Julia's laugh seemed forced and unnatural.

朱莉娅的笑容看上去勉强而不自然。

It was very cold, which seemed unnatural for late spring.

天很冷,晚春这个天气似乎不正常。

The aircraft rose with unnatural speed on take-off...

那架飞机以反常的速度起飞升空。

His unnatural manner made her feel uncomfortable.

他那做作的举止使她感觉很不舒服.

It seems unnatural for a child to spend so much time alone.

一个孩子独自一人待那么长时间似乎有点反常。

A bloody , demonical lust so unnatural you knew they were damned forever.

你们知道, 他们俩已经永远给打入地狱了.

There was an unnatural silence and then a scream.

一阵反常的寂静，接着便是一声尖叫。

an unnatural death (= one not from natural causes)

非正常死亡

Almost half of all unnatural deaths are related to alcohol, a study has found.

一项研究发现几乎半数的非自然死亡都与酒精有关.

She was, not unnaturally , very surprised at the news.

这消息自然让她大吃一惊。

As to the charge of unnatural, I could easily answer it to myself.

至于违背天理这个罪状, 我自己倒是很容易答辩的.

unnatural sexual practices

变态的性行为

Try to avoid shouting or speaking unnaturally.

尽量不要高声喧哗或是不自然地讲话。

He expected , not unnaturally, that I would return the money.

他理所当然地以为我会还钱.

The street was unnaturally quiet.

街上安静得有些异常。