Who knows when you might want to clean your filter or front element that has become moist from going in and out of cold temperatures?

你不知道什么时候可能要清理滤镜或者镜头盖之类，因为在寒冷的环境中，镜头很容易变得潮湿。

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A element is usually required as front matter for components and sections.

元素通常需要作为组成部分和节的前部内容。

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To draw a guard on a sequence diagram in UML 1.x, you placed the guard element above the message line being guarded and in front of the message name.

UML 1 . x中，为了在一个序列图上画一个约束，你把约束元件放在约束的消息线上，消息名字之前。

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The easy thing to do would be the following: start at the front end of the list, check the first element. If it's the thing I'm looking for, I'm done. It's there. If not, move on to the next element. And keep doing that.

从数组的第一个元素开始：,如果这是目标元素那么结束,如果不是的话就继续比较下面的元素，并一直这么比较下去,但如果，在某一点我发现我要寻找的数字。

麻省理工公开课 - 计算机科学及编程导论课程节选

Smallest element at the front.

好的，最小的元素到前面了。

麻省理工公开课 - 计算机科学及编程导论课程节选

However, it is far from clear that Israel's political leadership is yet ready to give up the separation of forces that has been a key element on its southern front for some 30 years.

BBC: Sinai attack marks step change in border violence

The radiator grille trim, consisting of two solid aluminum struts and a centrally positioned VW logo, is now a three-dimensional element that extends into the headlights and defines the entire front end.

ENGADGET: VW unveils CrossBlue plug-in SUV with iPad mini headrests and 85MPGe efficiency (eyes-on)

And last spring, the company redesigned the oven, replacing the traditional light bulb used for baking with an electric heating element, then switching the oven's door from the side to the front.

NPR: Burns Prompt Another Toy-Oven Recall