grave accent

1. 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。
2. There's a grave accent on the second letter of the French word'mere '.
   母亲的第二个字母是一个开口音。
3. 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。

noun

1. a mark (`) placed above a vowel to indicate pronunciation

   Synonym:    grave