obligatory

形容词

1. 1

   强制性的、必须的、义务的

   Attendance at the safety training is obligatory for all new staff.

   所有新进员工都必须参加这场安全训练。

2. 2

   照惯例的、例行的、少不了的常带戏谑语气

   We took the obligatory photo in front of the fountain.

   我们在喷水池前拍了那张少不了的纪念照。

3. 3

   有法律拘束力的、强制的法律

   The contract makes the payment obligatory within thirty days.

   该合约规定付款在三十天内具强制效力。