You enter the code in Listing 4 in a user's crontab on a machine outside the virtual environment.

您需要在虚拟环境以外的一个主机上的用户 crontab 中输入清单 4 的代码。

youdao

Dubai opened the 2, 717-foot (828 m) tower on Jan 4 in a blaze of fireworks that was televised around the world.

1月4日，“身高”2717英尺（合828米）的哈利法塔在一片绚丽的焰火中被揭开神秘面纱，当时这一盛况在全球进行了电视直播。

youdao

The final wear-off field test for the teams that survive the bench test will be Oct. 4 in a four-hour field test competition.

在92个小时后仍存有电量的系统将在10月4日进行为期4个小时的战场竞争测试。

youdao

Today we tell about 4 more individuals who are making a difference in the city of Washington, D.C.

VOA: special.2009.01.28

For Jeremy Siegel, in the latest edition of his book, the equity premium is 4% a year since 1802.

杰里米·西格尔在他最新一版的书中讲到,从1802年开始,股权溢价就是每年4%

耶鲁公开课 - 金融市场课程节选

you know, just for a little exercise, because I'm sitting in a cab 4 or 5 days a week.

做点运动，因为我一周四、五天都是在驾驶室里坐着。

愉快的音乐庆典 - SpeakingMax英语口语达人