2 sentences

1. 有些科目是禁忌的。

   yǒu​xiē kē​mù shì jìn​jì de.

   Certain topics are taboo.

   Source: CCMatrix

2. 精神疾病仍然是禁忌话题。

   jīng​shén​jí​bìng réng​rán shì jìn​jì huà​tí.

   Mental illness is still a taboo subject.

   Source: AI Challenger 2017