Each of these pieces can play an important role in location-based applications, but for now I'll focus on distance calculations, bounding-box filtering, and query parsing.

这5个因素都可以在基于位置的应用程序中扮演重要的角色，但是我在这里主要关注距离计算、限定框过滤和查询解析。

youdao

Focus on an area of sky where the fireworks will be, or on an object the same distance away.

可以对焰火即将绽放的那片天空对焦，或者找个与烟花相同距离的物体进行对焦。

youdao

Long runs teach not only your muscles how to handle the long marathon distance, but they also condition your mind to focus for such a long period of time.

长距离跑不仅教您的肌肉如何应付漫长的马拉松距离，还教您的大脑如何长时间集中注意力。

youdao

In other words, if you look too closely at a picture or if you stand too far away from it you don't see it clearly it's out of focus but if you achieve just the right distance from it, it comes into focus.

换句话说，如果你站得离一幅图画太近,或太远都无法看清它,它在焦距之外,但是如果你站在合适的位置上，焦距就对准了，画就清晰了。

耶鲁公开课 - 文学理论导论课程节选

This means the rear lens elements are as close as possible to the sensor, reducing the back focus distance of each lens to the minimum possible, thus achieving high resolution from edge to edge.

ENGADGET: Fujifilm grows X-series mirrorless lineup with 16.3-megapixel X-E1

Marathons now account for about two-thirds of all road racing prize money, which has encouraged the most talented distance runners to focus on the distance from the start of their careers.

WSJ: Breaking the Two-Hour Marathon Barrier

The cool part comes when they cut to the (luxurious) interior of the sedan and focus on the dashboard, where the Distance Plus data is displayed inside the speedometer as two tiny cars moving towards and away from one another, in response to real world conditions.

ENGADGET: Mercedes' new S-Class rocks Distance Plus urban cruise control