1·I walked along the outer edge of the track.
我沿着跑道的外缘走。
—— 《牛津词典》
2·On a planet like that, on the outer edge, you will have reservoirs of life, and there will be habitats that will persist.
在这样一个位于（太阳系可居住区）外缘的星球上，才能保有生命之水，才能维持栖息地。
3·Indoor air at the separation was separated out by the export control scheduling, and the water still flows through the impeller around the outer edge of backwater hole, and mixed air inhalation tube.
在分离室内空气被分离出来，由出口管排掉，而水仍经左右回水孔流向叶轮外缘，并与吸入管空气相混合。
4·Now, add some shape to each feather, keeping the outer edge bright, and add some shadow where one feather overlaps the other.
现在，添加每根羽毛的形状，外缘保持明亮，并且增加一些叠在下一根羽毛上的阴影。
5·The closed line forms the outer edge of the surface.
封闭线构成了表面的外缘。