Echo 按字面意思输出所有内容

引号将按原样输出：

echo "Some Text"

"Some Text"

评论标记被忽略：

echo Hello World REM this is not a comment because it is being echoed!

Hello World REM this is not a comment because it is being echoed!

但是，echo 仍将输出变量 - 请参阅变量用法 - 特殊字符仍然生效：

echo hello && echo world

hello
world