Matches modifier symbols such as circumflex accent , grave accent , and macron.

匹配修饰符号，如抑扬音、抑音符号和长音符号。

If any part of a shell command is enclosed by back quotes (a character also known as a grave accent), it is executed and the output placed on the command line.

如果shell脚本的某一部分用单引号(也称为重单符)括起来，那么将执行这个部分并将结果放在该命令行内。

The only written accent is the grave, which is used when-ever a word of more than one syllable stresses the final vowel (città—city).

唯一的标音符号是“、”，这个符号在两个音节以上的词的重音落在最后的元音上时使用（città；