在电脑速度不是很快的年代，::代替快速眼动是最好的选择。 REM'ed行被读取，然后忽略。:“埃德一行都被忽略了。”这可以在“过去”加速你的代码。而且在快速眼动之后你需要一个空间，在::之后你不需要。

正如第一条评论所说:你可以在任何你觉得需要的行中添加信息

SET DATETIME=%DTS:~0,8%-%DTS:~8,6% ::Makes YYYYMMDD-HHMMSS

至于跳过的部分。 把REM放在每一行的前面是相当耗时的。 如前所述，使用GOTO跳过部分是跳过大块代码的一种简单方法。确保在希望代码继续的位置设置:LABEL。

SOME CODE

GOTO LABEL  ::REM OUT THIS LINE TO EXECUTE THE CODE BETWEEN THIS GOTO AND :LABEL

SOME CODE TO SKIP
.
LAST LINE OF CODE TO SKIP

:LABEL
CODE TO EXECUTE

我更喜欢用:

REM评论 &REM内联注释

例子:

@echo off
set parameter1=%1%
REM test if the parameter 1 was received
if defined parameter1 echo The parameter 1 is %parameter1% &REM Display the parameter

不，普通的批处理文件使用REM作为注释。ECHO是在屏幕上打印内容的命令。

要“注释掉”文件的部分，您可以使用GOTO。所有这些命令/技术的示例:

REM it starts here the section below can be safely erased once the file is customised
ECHO Hey you need to edit this file before running it!  Check the instructions inside
ECHO Now press ctrl-c to interrupt execution or enter to continue
PAUSE
REM erase the section above once you have customised the file
python executed1.py
ECHO Skipping some stuff now
GOTO End
python skipped1.py
python skipped2.py
:END
python executed2.py

我能说什么呢?批处理文件是时代的遗迹，它们笨重而丑陋。

你可以在这个网站上阅读更多。

编辑:修改了示例，使其包含你显然正在寻找的元素。

注释一行

对于注释行，使用REM或::though::可能会在括号内失败

在以!<分隔符开头的延迟展开行中，>将被忽略，因此可以用于注释:

@echo off

setlocal enableDelayedExpansion

echo delayed expansion activated
!;delayed expansion commented line
echo end of the demonstration

在行末注释

对于行末的注释，您可以再次使用rem和::结合&:

echo --- &:: comment (should not be the last line in the script)
echo --- &rem comment

在文件末尾注释

因为exit命令后会被解析，你可以使用它在文件末尾添加注释:

@echo off

echo commands

exit /b 

-------------------
commnts at the end 
of the file
------------------

内联注释

不存在的变量的展开将被什么都不替换，并且设置一个变量=相当困难，你可以在内联注释中使用这个:

@echo off

echo long command %= this is a comment =% with an inline comment

多行注释

对于多行注释，可以使用GOTO(用于括号外)和REM带有条件执行(用于括号内)。详情如下:

@echo off

echo starting script

goto :end_comments
 comented line 
 one more commented line
:end_comments

echo continue with the script

(
    echo demonstration off
    rem/||(
      lines with
      comments
    )
    echo multiline comment inside
    echo brackets
)

同样的技术用宏来美化:

@echo off

::GOTO comment macro
set "[:=goto :]%%"
::brackets comment macros
set "[=rem/||(" & set "]=)"

::testing
echo not commented 1

%[:%
  multi 
  line
  comment outside of brackets
%:]%

echo not commented 2

%[:%
  second multi 
  line
  comment outside of brackets
%:]%

::GOTO macro cannot be used inside for
for %%a in (first second) do (
    echo first not commented line of the %%a execution
    %[%
        multi line
        comment
    %]%
    echo second not commented line of the %%a execution
)

The rem command is indeed for comments. It doesn't inherently update anyone after running the script. Some script authors might use it that way instead of echo, though, because by default the batch interpreter will print out each command before it's processed. Since rem commands don't do anything, it's safe to print them without side effects. To avoid printing a command, prefix it with @, or, to apply that setting throughout the program, run @echo off. (It's echo off to avoid printing further commands; the @ is to avoid printing that command prior to the echo setting taking effect.)

所以，在你的批处理文件中，你可以使用这个:

@echo off
REM To skip the following Python commands, put "REM" before them:
python foo.py
python bar.py

使用::或REM

::   commenttttttttttt
REM  commenttttttttttt

但是(正如人们所指出的):

如果它们不在行首，则添加&字符: 你的命令在这里&::commenttttttttttt 在嵌套部分(IF/ELSE, FOR循环等…)::后面应该跟着法线，否则会给出错误(在那里使用REM)。 ::在setlocal enabledelayeexpansion中也可能失败