The first character must be a number between 1 and 9, and the next three characters must be a number between 0 and 9 or an uppercase character between A and Z (see Listing 4).

第一个字符必须是 1 到 9 间的数字，后三个字符必须是 0 到 9 间的数字或是 A 到 Z 间的大写字符（参见 清单 4）。

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The plus sign indicates that the pattern enclosed in the parentheses (any character from A to Z, a to z, or 0 to 9) should occur one or more times in sequence.

加号表示围在括号中的模式（从 A 到 Z、a 到 z 或 0 到 9 中的任何字符）可依次出现一次或多次。

youdao

Namely, we will be saying the /a normal vector is x, y, z over a, plus or minus depending on whether we want it pointing in or out.

我们容易知道,法向量为，正负号取决于它是指向外面还是里面。

youdao

And we know as we go across a row in the periodic table, what's happening is that z effective or the effective pull on the nucleus is increasing.

而我们知道沿着周期表的某一行向右看，有效核电量,或者说原子核的有效引力是在逐渐增大的。

麻省理工公开课 - 化学原理课程节选

Z So it would be incorrect to try to assign this to a variable X or Y or Z, because it doesn't actually give me anything back.

这个是错误的，来赋值这个给变量X或Y或,因为它的确没有返回什么给我。

哈佛公开课 - 计算机科学课程节选

And it turns out that if we have a, for example, for s, a very large z effective or larger z effective than for 2 p, and we plug in a large value here in the numerator, that means we're going to end up with a very large negative number.

结果是如果我们有一个，举例来说对于s一个很大的有效电荷量或者,比2p大的有效电荷量，并且我们将一个较大的值代入计算器，那意味着我们最后会得到,一个非常大的负数。

麻省理工公开课 - 化学原理课程节选

The results of the study, called Aggrastat to Zocor, or A to Z, were presented today at a conference in Munich and published online in The Journal of The American Medical Association.

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Though it was likely Jay-Z or West, it could have also been a production studio or a record label.

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When her saga is completed in a decade or so with the letter Z, Ms. Millhone may well join such classic snoops as Sherlock Holmes, Perry Mason, Nero Wolfe, Miss Marple and a handful of others in mystery immortality.

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