第六課：音級和變音記號

A half step is the distance from one key on the keyboard to the next adjacent key.
（鋼琴鍵盤上兩個鍵相鄰的距離是一個半音）
Key 1 to Key 2 is a half step since they are next to each other.
（相鄰的鍵1和鍵2的距離是一個半音） |

A half step is not always from a white key to a black key.
（半音並不總是從一個白鍵跳到一個黑鍵）
In this example, Key 1 and Key 2 are still next to each other.
（在這個例子中，鍵1和鍵2也是相鄰的） |

An accidental is a sign used to raise or lower the pitch of a note.
（變音記號被用來抬升或降低一個音的音高）
The first accidentals that we will discuss are the flat and the sharp.
（我們先來看一下降音記號和升音記號）
The flat lowers a note by a half step while the sharp raises a note by a half step.
（降音記號將一個音符的音高降低一個半音，升音記號將一個音符的音高升高一個半音）
When typing, you can use a # to represent a sharp and a b to represent a flat.
（打字的時候可以用#來代表升音記號，用b來代表降音記號）