Accidental placed before a note that raises it by two semitones .

在由二个半音培养它的笔记之前被安置的偶然。

The chromatic scale is composed of 13 notes , all semitones .

半音阶由13笔记，所有半音组成。

Half steps or semitones occur between the second and third degrees of the scale ( the supertonic and the mediant ) and between the fifth and sixth ( the dominant and submediant ) .

半音介于第二级和第三级音阶之间（即上主音和中音），第五级和第六级音阶之间（即属音和下中音）。

The half steps or semitones occur between the third and fourth degrees of the scale and the seventh and eighth , that is between the mediant and the subdominant and between leading tone or leading note and the tonic .

半音在第三和第四级音阶，第七和第八音阶之间，即中音和下属音，导音和主音之间。

The pentatonic scale , a scale of five notes , is a scale without semitones .

五声音阶包含五个音，并且没有半音阶。