2 sentences

1. 学校午餐是强制性的。

   xué​xiào wǔ​cān shì qiáng​zhì​xìng de.

   School lunch is compulsory.

   Source: OpenSubtitles

2. 出席是强制性的。

   chū​xí shì qiáng​zhì​xìng de.

   Attendance is mandatory.

   Source: OpenSubtitles