1·Next comes an element known as the: obligatory scene.
接下来是一个被称为“强制性场景”的元素。
2·I saw them as obligatory scripts, scenarios that could be learned and performed without the achievement of real change.
我把这些观点看作是强制性的剧本，当中所有的情节都可以学习、表演，却无法带来现实的改变。
3·Preschool was available to children between the ages of three and six; it was obligatory from age five.
三至六岁之间的孩子需接受学前教育。 从五岁开始教育是强制性的。
4·The path to obligatory cooperation - one that other primates did not take - led to social rules and their enforcement, to human altruism and to language.
强制性的合作之路——其他灵长类动物没有采用这个方法——导致了社会规则和他们的强制实行，还有人类的无私和语言。
5·This step is not obligatory, it is just the code you no longer need.
这一步是不是强制性的，它只是你的代码不再需要。