1.
The duration of a vowel.
音延，音长元音发音的持续时间
2.
Give the semibreve its full value.
奏出该全音符的全音长.
3.
The duration of a syllable in quantitative verse.
音节长短在音量的诗歌中某音节的音长
4.
A sound of distinct pitch, quality, and duration;a note.
音具有清晰的声调、音质和音长的声音；一个音阶
5.
a vowel whose quality or length is changed to indicate linguistic distinctions (such as sing sang sung song).
改变了音质音长以显示语言区别的元音。
6.
A long syllable, vowel, or consonant.
长音节长音节、长元音或长辅音
7.
be adept at [in] (teaching) music
擅长 (教) 音乐
8.
a diacritical mark (-) placed above a vowel to indicate a long sound.
放在元音上表示发长音的发音符号（-）。
9.
(of a metric foot) characterized by two short syllables followed by a long one.
（指音步韵律）两个短音后跟一个长音。
10.
The Influence of Japanese Long Tone,Dial Tone and Promote Tone on Intonation
日语长音、拨音、促音对声调的影响
11.
The relative duration of a tone or rest.
音的长短音符或休止符的相对长度
12.
Having a comparatively great duration. Used of a vowel or consonant.
长音的有较长持续时间的。用于元音或辅音
13.
The sustaining of a note longer than its indicated time value.
延长的音符长于规定的节拍长短的音符维持
14.
Macron: Short line over a vowel or syllable to indicate that the accent is long. See Accents.
长音符号:在母音或章节之上的短划，表示长音。参阅音标。
15.
a school master well seen in music
一个精通音乐的校长
16.
The body is a long and narrow sound box made of wood.
琴身为狭长形木制音箱，
17.
She is skilled in music and the song.
她擅长音乐和歌唱。
18.
How much time do you spend listening to music?
你花多长时间听音乐？