The ftp_cdup() function changes the current directory to the parent directory (one step up).

函数的作用是：切换到当前目录的父目录（上一步）。

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Many things can be said regarding C++, but one thing is sure: C++ moved programmers one step up on the programming ladder.

关于C++有很多东西值得探讨，但确定的一点是：C++助力程序员在编程之梯上迈上了一个新台阶。

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The swing doors had moved in diminishing pendulum movement, and now there was nothing but molecular reverberation, one step up from the imaginary.

弹簧门的摇摆幅度慢慢减小了，从假想的层面上更进一步，现在空气中只剩下了四下回荡的分子运动。

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Armstrong summed up the momentous event with one simple, elegant phrase: "That's one small step for man;

VOA: standard.2009.07.16

Sure, there'd be some new particular puzzle you hadn't seen before, but you'd sort of step up a level and say, "Although I haven't seen this particular one before, I've seen crossword puzzles before.

当然肯定有你没见过的特殊填字游戏，但你会退一步说，“虽然我没见过这个特殊的填字游戏，但我见识过填字游戏。

耶鲁公开课 - 死亡课程节选

President Umaru Yar'Adua has come under pressure to step up his anti-graft drive in one of the world's most tainted countries since he came to power in 2007.

VOA: standard.2009.04.18

George spells out how this works, especially for professionals who are one step up from low-paying, low-skill jobs like cashiers and truck drivers, and one step down from the CEO level, which still involves face-to-face meetings and personal, rather than digital networking.

FORBES: Cover Story Spells Out Why You Must Be On LinkedIn

The point is that you always dress one step further up the clothing ladder than your prospect, but not two.

FORBES: Small Business People Don't Automatically Get a Pass on Dressing for Success

"I don't know if you've seen a Syracuse team recently that has one player step up and score six or seven goals, and that's how we win the game, " Desko said.

WSJ: Top-seeded Syracuse surging as tournament nears