A But I tend to use P Q R for sentences and A for A, now that I have explained it, that should be smaller case.

但是我喜欢用P，Q，R来代表句子，A就代表，我已经解释了，应该是小写的。

youdao

The first argument to getopts is a list of option letters to be recognized, in this case, p and r.

getopts 的第一个参数是一列要识别的选项字母，在本例中是 p 和 r。

youdao

When someone is knitting a scarf or a sweater the phrase knit one purl two mightfit the context, but in this case the purl is a different word spelled P U R Land comes from a source meaning “twist.”

而当某位女士针织围巾或是毛衣的时候，她所用的口诀“正一针，倒两针（knit one, purl two）”也许挺符合本文的语境。 不过，这个例子里的单词purl拼写却完全不同——P U R L ——它的来源有着“旋转（twist）”的意思。

youdao

A list of American colleges and universities that offer financial aid to foreign students can be found at edupass.org -- e-d-u-p-a-s-s dot o-r-g.

VOA: special.2009.02.05

pV=RT p plus a over v bar squared times v bar minus b equals r t. All right if you take a equal to zero, these are the two parameters, a and b. If you take those two equal to zero you have p v is equal to r t.

我们就回到,也就是理想气体,状态方程,下面我们来看看,这个方程。

麻省理工公开课 - 热力学与动力学课程节选

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