If the roll forward set has not been rolled forward far enough to be consistent with the database, the undo phase cannot occur.

如果前滚集前滚得不够远，无法与数据库一致，则不会出现撤消阶段。

youdao

The troop of vagabonds turned out at early dawn, and set forward on their march.

这群游民黎明时分就出来了，随即开始了他们的远行。

youdao

Clara tried to set her feet forward, but got discouraged.

克拉拉试图迈出她的脚，但又缩了回去。

youdao

Here,he uses a set of buttons attached to a computer to make the silent robot move forward, backward or around in circles.

VOA: special.2009.12.17

And one of the things that was useful here is, that we actually know that the set of primitives that you want to use is very straight-forward.

这儿有一个很有用的东西是，我们实际知道你想用的,一系列基本类型是非常明显的。

麻省理工公开课 - 计算机科学及编程导论课程节选

The problems are set up so that, if you start down the right path, it should be pretty straight-forward to work it through If you start down a plausible but incorrect path, you can sometimes find yourself stuck in the weeds somewhere, and we want to bring you back in.

问题提出了，如果你从，一开始就走正确的道路，解决的途径,就一目了然了,如果你走上一条貌似正确但实际错误的道路，你会在某时某刻,发现自己陷入泥沼，于是我们就会把你拉回来。

麻省理工公开课 - 计算机科学及编程导论课程节选

Jose Angel Valdes was sent off for a second booking with 10 minutes left after Alvaro Negredo went down clutching his face, and the Sevilla forward set up defender Cala from the resulting free-kick.

CNN: STORY HIGHLIGHTS

In addition, the diminutive forward set a new record for the European Champions League by scoring 14 goals during the 2011-12 campaign, a period when he became the first man to score five goals in a game in the competition (against Bayer Leverkusen).

CNN: Messi crowned world's best for record fourth time

He recently put forward a set of ideas that Congress could act on that build on the measures he proposed last fall.

WHITEHOUSE: Press Briefing