Two forms of regular expression syntax are used with the GNU grep program found on most Linux systems: basic and extended.

大部分Linux系统中的gnu程序可以使用两种常规表达式语法：basic和extended。

youdao

On the basic of former engine, the angle variable partial program of the fan and compressor guide vane of engine mathematical model is been renewed.

在原发动机模型的基础上，补充编制了发动机数学模型的风扇和压气机导叶角度可调的部分程序；

youdao

In this paper, an utility program has been worked out for spectrographic analysis based on PB-700 microcomputer and common BASIC language.

本文使用PB - 700微型计算机和通用的BASIC语言编制了摄谱法光谱分析数据处理程序。

youdao

At present, fewer than 19, 000 employers nationwide have signed on to use the federal basic pilot program, which instantly checks an employee's name and Social Security number to see if he's a citizen, or his work authorization if he's not.

FORBES: Magazine Article

And the DOJ itself participates in Basic Immigration Enforcement Training (BIET), a program designed to train state and local law enforcement on immigration enforcement.

FORBES: The Obama Administration's Hypocrisy on Immigration