Legibility is how easy it is to tell the letters apart and actually read the words.

Legibility is legibility指的是 how easy it is to tell the letters apart and actually read the words你能不能輕鬆分辨字母、真正把字讀出來這件事。

Big, clear type on a street sign has good legibility; a faded photocopy, or handwriting that bunches into one grey line, has poor legibility.

Big, clear type on a street sign路牌上大大清楚的字 has good legibility就是有好的legibility；a faded photocopy一張褪色的影印本, or handwriting that bunches into one grey line或是擠成一團灰線的手寫字 has poor legibility則是legibility很差。

Size, spacing, contrast, and the shape of the letters all change it.

Size, spacing, contrast, and the shape of the letters字的大小、間距、對比，還有字母的形狀 all change it都會影響它。

Though actually, this is about the look of the writing, not about whether the sentences are easy to follow. A hard science paper can have excellent legibility if the print is sharp.

Though actually不過其實，this is about the look of the writing這講的是文字外觀的問題，not about whether the sentences are easy to follow不是句子好不好懂的問題。A hard science paper一篇很難的科學論文 can have excellent legibility也可能有很好的legibility if the print is sharp只要印刷夠清晰。

The nearby word readability is closer to “is this writing easy as language?” People use the two loosely, but they point at different problems.

The nearby word readability相近的字readability is closer to比較接近 "is this writing easy as language?"「is this writing easy as language?」（這段文字當作語言好不好懂）這個問題。People use the two loosely大家有時候會把這兩個字混著用，but they point at different problems但它們指的其實是不同的問題。