1·Photographs typically capture the presence of nature and are often free of man-made obstructions.
照片的特色在于捕捉自然之风采，往往不受人为障碍的约束。
2·Work at overcoming emotional obstacles and other personal obstructions without worrying so much about where they came from. Just get on with the work of living well.
不要担心这些情绪和其他的个人障碍源于何处，去克服他们，你只需要外委生活得更好努力。
3·So, all of these financial obstructions that we had built up were suddenly being swept away.
所以我们所有的金融障碍，都忽然消失了。
4·Convex polygons are a usefulrepresentation, since we know that there are no obstructions between any twopoints inside a polygon.
凸多边形是一个很有用的表示法，因为我们知道凸多边形内部任意两点之间没有障碍。
5·Intensive string operations and incautiously crafted regexes can be major performance obstructions, but the advice in this chapter helps you avoid common pitfalls.
密集的字符串操作和粗浅地编写正则表达式可能是主要性能障碍，但本章中的建议可帮助您避免常见缺陷。