A key signature is a collection of every accidental found in a scale.
（调号是调式中所有变音记号的集合）
To demonstrate this, we will use the key of C Minor, which has three flats.
（我们用包含三个降音的C小调来演示一下）
Next, let's examine D-flat Major, which has five flats.
（下面我们看一下降D的大调音阶，它有五个降号）
As you may have noticed, the flats are arranged in a special order.
（你可能会注意到，写降号的顺序是特定的）
B-flat is first, followed by E-flat, A-flat, D-flat, and G-flat.
（降B先写，接下来是降E、降A、降D、降G）
The C-sharp, F-sharp, and G-sharp move into the key signature.
（把升C、升F、升G移到调号上）
Finally, let's try E Major, with four sharps.
（最后，我们来试一下有四个升号的E大调）
The F-sharp, G-sharp, C-sharp, and D-sharp move into the key signature.
（把升F、升G、升C、升D移到调号中去）
Sharps are arranged in the opposite order of flats.
（升号的顺序和降号正好相反）
F-sharp comes first, followed by C-sharp, G-sharp, and D-sharp.
（先写升F，然后是升C、升G、升D）
Next comes A-sharp, E-sharp, and finally B-sharp.
（然后是升A、升E、升B）
Use this chart to reference key signatures for both treble and bass clefs.
（这是在高音和低音谱号旁写的调号）