adj.强制性的，强制的，法定的，义务的
n.受托者

原形：mandatory复数：mandatories

Citizens is mandatory to pay taxes.
公民缴税是强制性的。
The reply to this letter is mandatory.
这封信非答复不可。
It is not only a form of mandatory access control.
它不仅是强制访问控制的一种形式。
Attendance at the meeting is mandatory for all team members.
参加会议是所有团队成员必须的。
Wearing a helmet while riding a motorcycle is mandatory by law.
根据法律规定，驾驶摩托车时佩戴头盔是强制性的。
Completing the safety training course is mandatory before starting work.
开始工作前，完成安全培训课程是强制要求的。
It is mandatory to submit your tax returns by April 15th each year.
每年4月15日前提交税务申报是强制性的。
All new employees must attend an orientation session; it's mandatory.
所有新员工都必须参加迎新会议，这是强制性的。
The use of personal protective equipment is mandatory in this laboratory.
在本实验室使用个人防护装备是强制要求的。
Mandatory drug testing is conducted for all athletes participating in the competition.
对所有参赛运动员进行强制性药物测试。
Under the new policy, recycling has become mandatory for all households.
根据新政策，回收利用对所有家庭来说都是强制性的。
Mandatory background checks are performed on all applicants for this position.
对申请该职位的所有人进行强制性的背景调查。
Attending the fire drill is mandatory to ensure everyone knows the evacuation procedures.
参加消防演练是强制性的，以确保每个人都知道疏散程序。