These rules describe, for example, which elements are valid, the order of elements within a document, the data types of attributes, whether an element is required or optional, and so on.

这些规则定义哪些元素是有效的、文档中元素的次序、属性的数据类型、一个元素是必需的还是可选的等等。

youdao

The aim is to restore law and order, a key element of the internationally-backed "roadmap" peace plan.

巴勒斯坦部署警察的目的是为了恢复法律秩序，这是国际社会支持的“中东和平路线图”计划中的一个关键因素。

youdao

Each message part within that element must correspond exactly (in name and order) to a parameter of that programming-language operation.

在这个元素中的每个消息部分必须严格地对应(在名称和次序方面)于该编程语言操作的参数。

youdao

It poses other kinds of difficulty, let's say; but in the case of fiction, in order to be engaged, in order to enter the hermeneutic circle properly, we need the element of surprise, as I say, as a way of distinguishing between fiction and nonfiction.

它的确带来了其它困难，我们可以这样说;,但是在读文学时，为了投入进去，为了合适地进入解释循环，我们需要“惊讶“这个元素，正如我所说，作为区分文学和非文学的一点。

耶鲁公开课 - 文学理论导论课程节选

"They're new to the team and could bring a fearless element to the top of the order, " said paceman Anderson.

BBC: Anderson backs 'fearless' openers Kieswetter and Lumb

The artists at Legend3D began by studying every shot in the film and mapping out each element on screen in order to create a realistic sense of depth.

ENGADGET: Top Gun Blu-ray 3D details revealed, comes home February 19th after IMAX 3D run

Mr. DIAMOND: That's true, and we have many different type of wars, and one of them is an insurgency against the new political order with a heavy terrorist element that aims to strike at Europe and the United States.

NPR: Is Victory in Iraq Still Possible?