所有骑摩托车的人都必须戴头盔，这是强制性的。
试想一下做老师的潜在特殊待遇：在办公室里养一只沙鼠做宠物，每天享受强制性的休息时间。
Consider the potential perks of a career in teaching：a pet gerbil in your office, and a mandatory recess every day.
这就需要建立一个全球性的检查和制衡体系，在我们与自然打交道时制定强制性的规则和约束。
This raises the need for a global system of checks and balances, for mandatory rules and constraints in our dealings with nature.
有一位全程导游，可安排非强制性的进餐和观光。
There is a tour guide throughout the trip who will organize optional dinners and sightseeing.
这种连接的安全性是强制性的，以保证在这些组件之间交换的消息的完整性和机密性。
It is imperative that this connection is secure to protect the integrity and confidentiality of messages being exchanged between these components.
这个字段是强制性的，它识别查询项。
循环是阶段性和强制性的 。
其d c属性是强制性的。
“至少哈佛的政策不是强制性的，”他说。
处理其他所有非强制性的顶级测试。
规则是强制性的且在逻辑上是可执行的。
首先这些课程是可选课程，但是可能成为强制性的。
The courses will be optional at first, but could become mandatory.
这项新政策是强制性的，用户没有选择。
The new policy isn't something you have to opt-in to. It's not something you can opt-out of.
在土耳其，6-14岁孩子的教育是免费和强制性的。
Education is compulsory and free for the ages between 6 to 14.
但IAEA和WANO的标准都不是强制性的。
京都协定制定了强制性的国家限制标准为各工业化的国家。
The Kyoto Protocol set mandatory national limits for industrialized countries.
这并非强制性的，在英国人们更愿意写封短信，而不是录像。
This is not compulsory and in the UK messages are written rather than recorded on video.
这并非强制性的，在英国人们更愿意写封短信，而不是录影。
"This is not compulsory and in the UK messages are written rather than recorded on video."
事件对于通信两端的组件，强制性的要求要少得多。
Events place fewer requirements on the components at each end of the communication.
笼统的建议或者强制性的干预可能都不会得到我们所希望的效果。
And blanket recommendations or compulsory interventions may not be as effective as we would hope.
那就是在国际范围内，对所有的临床试验采取强制性的注册制度。
But there is also a more elegant one, which is arguably even more important: a compulsory international trials register.
这种中断机制不是强制性的，不是所有的JOLAP提供程序都支持。
This interruption mechanism is not mandatory and may not be supported by all JOLAP providers.
它是一个强制性的元素且其子元素通常属于一个用户定义的名称空间。
It is a mandatory element and its child elements normally belong to a user-defined namespace.
和在新西兰一样，对于5- 15岁的孩子来说，教育是强制性的。
As in New Zealand, education is compulsory for children aged five to 15.
他们可以造成的影响很小，因此没有能力对抗强制性的规定。
They can do a bit of damage but are not really capable of much up against the coercive power of the state.
同样，个人交付和通用应用程序模式也都是强制性的，但我们并不需要。
Similarly, Personalized Delivery and Population Application patterns are mandatory, but we do not have these requirements.
同样，个人交付和通用应用程序模式也都是强制性的，但我们并不需要。
Similarly, Personalized Delivery and Population Application patterns are mandatory, but we do not have these requirements.
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