A miss is as good as a mile.是什么意思？

A miss is as good as a mile.

失之毫厘,差之千里

Miss

n. （用于姓名或姓之前，对未婚女子的称呼）小姐，女士，失误；v. 漏掉，错过（机会），思念，没遇到；

例句
We were not altogether sure that the comet would miss the Earth...
我们不能完全肯定彗星不会与地球相撞。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

good

adj. 好的，优秀的，有益的，漂亮的，健全的；n. 好处，利益，善良，善行，好人；adv. 同well；

例句
This recipe makes a good accompaniment to ice-cream.
这道食谱适合搭配冰激凌。

mile

n. 英里，很远的距离，一英里赛跑；

例句
Oil has come ashore on a ten mile stretch to the east of Plymouth...
绵延10英里的浮油已经到达了普利茅斯东岸。