There is no question mark after the title of this article because the title is not a question. It's a declarativestatement.
在本文标题的后面没有问号，因为该标题不是一个疑问。它是一个陈述性的报告。
2
Each use case is represented by an oval, and labeled with a declarativestatement that describes what action the use case is intended to perform.
每个用例都由一个椭圆形代表，用描述这个用例将要执行什么样的行为的说明型陈述进行标注。
3
This is the first time that this example is using a relation as a declarativestatement to define an expression (in other words, a value assignment) instead of using it for model-to-model mapping.