An interval measures the distance between two notes.
（兩個音符的距離用音程來衡量）

We will first discuss generic intervals, which are measured on the staff.
（首先我們來看在五線譜上使用的通用音程）

When two notes occupy the same line or space, they are a first (or a prime) apart.
（當兩個音符在五線譜上處於同一線或同一間時，就是同度）

C to C is an example of a first.
（C-C就是一個同度的例子）

D to D and E to E are also firsts.
（D-D，E-E也都是同度）

Accidentals are ignored when measuring generic intervals, only staff position matters.
（通用音程不考慮變音，在五線譜上的位置是唯一的衡量法則）

C—C-sharp, D—D-flat, and A-sharp—A-flat are still firsts.
（C-升C，D-升D，A-升A也都是同度）

As the notes become further apart on the staff, the interval type increases.
（音程隨著音符的距離而變化）

C—D, D—E, and E—F are all seconds.
（C-D、D-E、E-F都是二度）

C—E, D—F, and E—G are all thirds.
（C-E、D-F、E-G都是三度）

Notice that thirds will always share the same staff position type — either both on a line or both on a space.
（注意任意距離為三度的兩個音在五線譜上的位置屬性都一樣，比如都線上上，或都在間上）

C—F, D—G, and E—A are all fourths.
（C-F、D-G、E-A都是四度）

C—G, D—A, and E—B are all fifths.
（C-G、D-A、E-B都是五度）

C—A, D—B, and E—C are all sixths.
（C-A、D-B、E-C都是六度）

C—B, D—C, and E—D are all sevenths.
（C-B、D-C、E-D都是七度）

C—C, D—D, and E—E are all eighths.
（C-C、D-D、E-E都是八度）

Use this chart to reference generic intervals.
（這張圖上表示了音程）