形容詞 unnatural:

1. not in accordance with or determined by nature; contrary to nature
2. speaking or behaving in an artificial way to make an impression
   同義詞：affected
3. distorted and unnatural in shape or size; abnormal and hideous
   同義詞：grotesque, monstrous

1. It's not unnatural that you should feel annoyed.
   你感到生氣是不足為怪的。
2. His unnatural manner made her feel uncomfortable.
   他那做作的舉止使她感覺很不舒服。