Single quotes are better, because then you can use double quotes inside the one-liner.
单引号更好，因为使用单引号后您可以在一行程序内使用双引号。
Atoms must start with a lower case character, or you can delimit with single quotes.
原子值必须以小写字母开头，否则需要加上单引号。
To ignore a signal, use two single quotes in place of the command_list
要忽略某个信号，使用两个单引号代替 command_list
Jython string can use either single or double quotes.
Jython字符串可以使用单引号，也可以使用双引号。
Listing 2. Single vs. double quotes.
清单2.单引号vs。
The extra single quotes are escape characters.
“额外” 的那个单引号是换码符。
The use of the two single quotes is discussed in the next section.
下一节讨论为什么要使用两个单引号。
Shells make everything between quotes a single argument.
Shell使引号之间的所有内容都成为一个参数。
You can use either single or double quotes.
你可以用单引号或者双引号。
You can use either single or double quotes.
你可以用单引号或者双引号。
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