unnatural

柯林斯詞典

1. ADJ If you describe something as unnatural, you mean that it is strange and often frightening, because it is different from what you normally expect. 異常的
The aircraft rose with unnatural speed on takeoff. 飛機以異常之速起飛升空。
2. unnaturallyADV 異常地[ADV adj]
The house was unnaturally silent. 房子異常地寂靜。
3. ADJ Behaviour that is unnatural seems artificial and not normal or genuine. 不自然的; 不正常的; 不真實的
She gave him a bright, determined smile which seemed unnatural. 她給了他一個快樂、堅定、看似不自然的微笑。
4. unnaturallyADV 做作地; 不正常地; 不真實地[ADV with v]
Try to avoid shouting or speaking unnaturally. 盡量避免做作地喊叫或講話。

Her translation is too literal , resulting in heavy , unnatural prose .
The dialogue sounded stilted and unnatural, perhaps because of the translation from the original Russian .
The daffodils are already coming out, which seems unnatural for so early in the year .
It would be unnatural not to feel concerned for your children's future .
She's died her hair in an attempt to cover up the grey , but it looks unnatural.