强制性的用英语怎么说？

强制性的

例句

• Is the appointment of worker-directors to be mandatory? 工人董事的任命是不是强制性的？
• It is compulsory for all motorcyclists to wear helmets. 所有骑摩托车的人都必须戴头盔，这是强制性的。
• Most women will be offered an ultrasound scan during pregnancy, although it's not obligatory... 大多数处于妊娠期的妇女将被建议接受超声波检查，不过这不是强制性的。
• Most women will be offered an ultrasound scan during pregnancy, although it's not obligatory. 大多数处于妊娠期的妇女将被建议接受超声波检查，不过这不是强制性的。
• Is the appointment of worker - directors to be mandatory? 工人董事的任命是不是强制性的?
• Nothing in this Agreement may be interpreted as derogation to compulsory provisions of law. 该协议中的任何条款均不可以被解释为对强制性的法律规定的损毁.