Musical notation was conceived for the C major scale and each line and space represents a note in this scale.

乐谱为C大音阶而构思，在这个音阶中的每一个线和间都代表一个音符。

《柯林斯英汉双解大词典》

The language was added in recent years to draw a clear line. It’s easy for students to point to this notation and say “Hey, Mom, I think you’re supposed to be gone now”.

这些语言可以说是划出一条明确界限，学生可以指着这些文字对家长说：“瞧，妈妈，您该走了吧。”

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You can use the $ notation for the last line to specify to the end of the file and double greater-than symbols (>>) after the w to indicate that you want to append to rather than overwrite the file.

对于最后一行，可以使用 $ 表示文件的末尾。 可以在 w 后面使用两个大于号（>>）表示希望把内容附加到文件中而不是覆盖文件。

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So you have what are called escape characters like backslash N that is the shorthand notation of telling the computer put a new line character here.

幸亏我们有一些类似反斜杠n的转义字符,这只是一种简化方式,用来告知电脑要在这新添一行。

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