not good

• They are not good employers .
  他们不是好老板。
• His mathematics are not good .
  他不长于计算。
• It is not good to tell lies .
  说谎是不对的。
• He is not good at numbers .
  他不擅长算术。
• I am not good at singing. i 'm here just to make up the number .
  我不会唱歌，我在这儿只是滥竽充数。
• It's not good for me !
  对我不相宜！
• I want to talk straight from the shoulder-your work is not good enough .
  我想坦白地说，你的工作做得不够好。
• I will come straight to the point -- your work is not good enough .
  我要直截了当地说你的工作做得不够好。
• It was not good for him to take any wine , but he drank with his eyes open .
  他明知喝酒对他没有好处，但偏要喝。
• He has a hard cross to bear; his wife is an invalid and his own health is not good .
  他负担很重，妻子残废，自己身体又不好。