Dpi is a way of measuring how finely a printer (or a scanner, or a printed picture) lays down dots in one inch of space. A higher number means smaller, tighter dots, so edges look sharper and photos look less rough. Home printing is often around 300 dpi; a quick draft can be much lower.

Dpi is a way of measuring how finely a printer (or a scanner, or a printed picture) lays down dots in one inch of space dpi 是一種測量方式，測的是印表機（或掃描器、印出來的圖片）在一英寸的空間裡點得多細密。A higher number means smaller, tighter dots數字越高代表點越小、越密, so edges look sharper and photos look less rough所以邊緣看起來更銳利，照片也比較不粗糙。Home printing is often around 300 dpi家用印刷通常大概是 300 dpi; a quick draft can be much lower快速草稿列印可以低很多。

Though actually, dpi is not really 'how much ink' in the sense of a wetter, darker page. A 600 dpi print is not automatically using more ink like a thicker pen. It is packing more dots into the same space, which is about detail, not about soaking the paper.

Though actually不過其實, dpi is not really 'how much ink' in the sense of a wetter, darker page dpi 講的並不是「用了多少墨水」那種讓紙更濕、更深色的意思。A 600 dpi print is not automatically using more ink like a thicker pen一張 600 dpi 的列印不會因此像用了較粗的筆一樣用更多墨水。It is packing more dots into the same space它是在同樣的空間裡塞進更多點, which is about detail, not about soaking the paper這是關於細節，不是關於把紙弄濕。

People also mix dpi with ppi (pixels per inch), the same kind of counting for screens rather than ink. In casual talk, someone may say dpi when they only mean 'is this sharp enough to print?'

People also mix dpi with ppi (pixels per inch)人們也常把 dpi 跟 ppi（每英寸像素數）搞混, the same kind of counting for screens rather than ink這是同一種計算方式，只不過用在螢幕而不是墨水上。In casual talk在輕鬆的對話裡, someone may say dpi when they only mean 'is this sharp enough to print?'有人說 dpi 時，可能只是在問「這夠不夠清楚可以印」而已。