line notation

基本解釋

Then the flux of F across a curve C is, by definition, a line integral but I will use notation F dot n ds.
根據定義，F通過平面曲線C上的通量是一個線積分,用符號F?n，ds表示。
UML 2 has addressed this problem by removing the "in-line" guard and adding a notation element called a Combined Fragment.
UML 2 已經通過去掉“in-line”約束，增加一個叫做組合碎片的符號元件，解決了這一個問題。
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.
對于最后一行，可以使用 $ 表示文件的末尾。可以在 w 后面使用兩個大于號（>>）表示希望把內容附加到文件中而不是覆蓋文件。

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.
幸虧我們有一些類似反斜杠n的轉義字符,這只是一種簡化方式,用來告知電腦要在這新添一行。
哈佛公開課 - 計算機科學課程節(jié)選