你可以决定不参加这样一场拍卖。

You might resolve not to enter such an auction.

youdao

我们决定不参加这次会议。

We concluded not to attend the meeting.

youdao

我们重新考虑了这个计划并且决定不参加了。

We have thought the plan over and decided not to join it after all.

youdao

This two is from that obfuscated C contest so this is not where we're going but this is where some people choose to go.

这个就是那个很混乱的C语言比赛,这并不是我们要去的比赛，你们可以根据爱好决定参不参加。

哈佛公开课 - 计算机科学课程节选