This is the first time that this example is using a relation as a declarative statement to define an expression (in other words, a value assignment) instead of using it for model-to-model mapping.

这是本例子第一次把关联作为一个定义表达式(换句话说，一个赋值语句)的声明性陈述来使用，而不是用它作模型到模型的映射。

youdao

Each use case is represented by an oval, and labeled with a declarative statement 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。

youdao

The third requirement above is stated in declarative form; it is quite granular and uses a "shall" statement.

上述第三条需求是声明形式的；

youdao

Right. Here's a declarative statement.

嗯，这是个陈述性的说法。

麻省理工公开课 - 计算机科学及编程导论课程节选