示例1：

pipeline{    agent {label "xxx"} // label is a special machine registered in Jenkins    environment{        CLONE_TRAINER_TEST_CMD = '''        cd $wksp  // shell command    '''    START_TRAINER_TEST_CLIENT_CMD = '''        // shell command    '''    }    stages{        stage("xxx"){   // can define by yourself, it will display in the beginning of Jenkins output log            parallel{                stage("xxx"){  // define task scenaria， such as 'build'                    agent {label "xxx"}  // a special machine                    steps{                        sh env.CLONE_TRAINER_TEST_CMD                        sh '''                            cd $wksp // shell command                           '''                    }                }                                stage("xxx"){                    agent {label "xxx"}                    steps{                        // shell command                    }                }            }        }    }}