Let's hope everything will go according to plan.

但愿一切都会按计划进行。

The race didn't go according to plan.

比赛没能按计划顺利完成。

But things do not go according to plan.

但事情并未按计划进行。

Realize that not everything will go according to plan.

你要明白并不是每一件事都会按照你所计划的发生。

You have to accept that not everything will go according to plan.

你需要接受不是每件事都是按照计划来的。