When we take a spring, something that - we are so familiar with now, and the spring has length l l in a relaxed state, k spring constant k, I can extend the spring with some force that I apply.
拿起一个弹簧,我们很熟悉了，松弛状态时,长度为，弹簧常数是，我可以用一些力,将其拉长。
2
Last year Michael k. Walters of the Air Force Institute of Technology and I came up with a different way of calculating the cumulative drift of the day of the week.
去年空军理工学院的迈克尔和我找到了另一种计算星期年度移位。
3
As in Listing 4, you can also specify the -k command-line option to force the script to continue even if some errors have been detected during xsltproc processing.