对于正式的使用，如果一个句子中存在多个变量，则变量可以用“#”符号（或“#1”和“#2”等）作为标记。

For formal use, the variable can be marked with a "#" symbol -- or "#1", "#2", and so forth -- if multiple variables exist in one sentence.

youdao

我对呼吸系统能做什么一无所知，我也不会给一个句子标上标点符号。

I had no idea what the respiratory system did and I couldn't punctuate a sentence.

youdao

使用简短词语、句子、段落、项目符号。页面不要太长。

Use short words, short sentences, short paragraphs, bulleted lists, and short pages.

youdao

How can you go from a finite list of symbols to an infinite number of sentences?

你如何使有限的符号,变成无限的句子

耶鲁公开课 - 心理学导论课程节选

So it's these little differences that you'll very quickly acclimate to but it's these stupid little syntactic details that trips off, especially those less comfortable early on because if you leave out a single character, namely that semicolon on the right hand side, nothing will work.

你会很快适应这些,微小的区别,但我们正是要把这些罗里吧嗦的语法细节,尤其是那些让人非常头大的句子啃下来才行,因为如果我们一旦遗漏掉某个符号，譬如一个分号,从另一方面看来，很有可能什么都工作不了。

哈佛公开课 - 计算机科学课程节选