macron意思是長音符，平調符。
1、長音符；平調符
The mark macron which is placed over a vowel in some languages and in the International Phonetic Alphabet to show that the vowel is stressed or long.
2、長音符號(Macron),由希臘語uaKp(makros)意「巨大」，原意為指示響音成為長響音。
雙語例句：
1、Macron Short line over a vowel or syllable to indicate that the accent is long . SeeAccents .
長音符號在母音或章節之上的短劃，表示長音。參閱音標。
2、Matches modifier symbols such as circumflex accent , grave accent,and macron .
匹配修飾符號，如抑揚音、抑音符號和長音符號。
3、Comparison of macron and microdilution antifungal tests of yeast .
酵母菌藥敏試驗常量與微量液體稀釋法的比較。