如果指定位置存在配置文件中指定要搜索的词，将向主程序返回1表示找到一个匹配字。
For each word specified in the configuration file to search for in the specified location, return 1 to the main program to let it know a match was found.
可以让vi在文件中的特定位置放上书签。方法是按escape键，再按m键，然后输入另一个表示书签引用的字母表字符。
You can tell vi to place a bookmark at a point in a file by pressing the m key followed by another alphabetic character that denotes the bookmark reference.
一般情况下，物体有多个可以放稳的位置，每个稳定位置均由对应的线段（称作“基线”）表示。
There are typically many stable positions and each is defined by one of these lines known as its base line.
这些动词表示继续保持在某一给定位置。
首席月球学家麦克·沃戈表示，新地图不仅可以精确定位安全着陆位置，还能提供该位置的各种详细信息，比如说该地的日照情况。
Chief lunar scientist Mike Wargo says the new maps can pinpoint safe landing sites, but also provide details about, for example, how that landing site is lit by the sun.
表示指定之字串中，位于指定位置的字元是否分类为字母或十进位数字。
Indicates whether the character at the specified position in a specified string is categorized as a letter or a decimal digit.
表示指定之字串中，位于指定位置的字元是否分类为字母或十进位数字。
Indicates whether the character at the specified position in a specified string is categorized as a letter or a decimal digit.
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