黑心

  1. ruthless and lacking in conscience
  2. vicious mind full of hatred and jealousy
  3. black core (flaw in pottery)

例句

很多公立学校的食堂都很黑心。

hěn duō gōng lì xué xiào de shí táng dōu hěn hēi xīn.

Many public school cafeterias are unscrupulous.