grave accent

基本解釋

Matches modifier symbols such as circumflex accent grave accent and macron.
匹配修飾符號，如抑揚(yáng)音、抑音符號和長音符號。
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).
唯一的標(biāo)音符號是“、”，這個(gè)符號在兩個(gè)音節(jié)以上的詞的重音落在最后的元音上時(shí)使用（città；
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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 腳本的某一部分用單引號（也稱為重單符）括起來，那么將執(zhí)行這個(gè)部分并將結(jié)果放在該命令行內(nèi)。