The first set, [A-Za-z], represents any letter.
第一个集合 [A-Za-z]表示所有字母。
The second set, [A-Za-z0-9_]{2,9}, represents a series of at least two and up to nine of any letter, any digit, and the underscore.
第二个集合 [A-Za-z0-9_]{2,9}表示由至少2 个至多9 个任意字母、数字和划线组成的序列。
You can use [: digit:] in place of [0-9], and [: alpha:] is a more portable replacement for [-a-za-z0-9_]. For example, you can strip all punctuation from a string by using the statement.
您可以使用[：digit：]代替[0 - 9]，并且[：alpha：]是比[- a - zA - z0 - 9 _]更具有可移植性的替代者。
Welcome to za za Bazaar, a restaurant so big that a map is provided in case baffled guests lose their bearings.
欢迎来到喳喳大排档，这个馆子是如此之大——以至于需要向各位提供地图以防迷路。
Diners on a test night in za za Bazaar, the largest restaurant in the UK, which will open in Bristol.
众多食客来喳喳大排档是为了宵夜，这个最大的夜市排档，开设在英国的布里斯托。
Rat: If the Za also say a Tao bottom of the heart son, I not afraid old cat how severe, afraid the old cat loved.
老鼠：咱也说句掏心窝子的话，我不怕老猫多么厉害，就怕老猫没有爱好。
Za fu of "surrounding tribes and ware" are written in a jocular and mocking note, and they are works in a chanting style about the national struggles, national fusions and national cultures.
“杂四夷及兵赋”包括用诙谐嘲谑的笔触所写的反映民族斗争、民族融合、民族文化的韵诵体作品。
It was shown that after the ZA alloy was processed by TIG welding, the weld seam consists mainly of columnar dendrites and a small amount of equiaxial crystals;
结果显示，新型模具ZA合金用TIG方法进行焊接，焊缝组织形态主要是柱状树枝晶和少量的等轴晶；
Presents a resistance furnace particularly designed for the continuous globing of ZA-1Q globular catalyst of synthetic ammonia.
本文所述电阻炉是为实现ZA-1Q球形氨合成催化剂的连续成球工艺而专门研究设计的。
明天又是战斗的一天。
Only adjusting technique factors with the balance and keeping a good place of the interface between solid and liquid, can the smooth ZA alloy line be continuously pulled out.
只有通过调节工艺参数，维持固液界面的良好位置，才能拉铸出表面光滑的线材。
Only adjusting technique factors with the balance and keeping a good place of the interface between solid and liquid, can the smooth ZA alloy line be continuously pulled out.
只有通过调节工艺参数，维持固液界面的良好位置，才能拉铸出表面光滑的线材。
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