cold-hearted
adj. 冷淡的,无情的
A cold-hearted person does not feel any affection or sympathy towards other people.
...a cold-hearted killer.
铁石心肠的杀手
John: I can't believe these businessmen are cold hearted enough to sell these kinds of products.
约翰: 我真不敢相信这些商人会黑心到卖这样子的商品.