In a horizontally symmetrical flag, the bottom half of the blue square is a mirror image of the top half.

而在水平对称的星条旗中，蓝色方形区域下半部为上半部的景象。

youdao

Most other fish have tails that are essentially symmetrical from top to bottom.

其他鱼的尾巴基本上都是从上到下对称的。

youdao

In considering the traditional scheme, note from the illustration at the top of the page how the planetary rulerships fan out in a symmetrical pattern from the union of the Sun and Moon.

最顶上的一排，反应的是行星的主宰方式，除了太阳和月亮同时主宰白天黑夜以外，其他的行星都对称的分布。

youdao

Well the asymmetrical spread of matter suggests it was ejected from the top and bottom of the star faster than elsewhere, unlike typical supernova remnants that leave symmetrical patterns.

ENGADGET: Alt-week 2.16.13: robo-rats, a young black hole and a computer that cannot crash