公式： f(x)={xif x0α(ex−1)if x≤0
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，更多细节参见夫子
The shadowy world of abandoned oil tankers。Line官方版本下载是该领域的重要参考
I rendered 1,418 Unicode confusable pairs across 230 fonts. Most aren't confusable to the eye. 96.5% score low on visual similarity. But 82 pairs are pixel-identical in at least one font.