1. Expression：jump the track

Explanation：To change suddenly from one thing, thought, plan, or activity to another. （突然容一个事情，想法，计划或活动转变到另一个事情，想法，计划或活动等，思维跳跃）

Example：The entire project jumped the track and we finally had to give up.

整个项目偏离原定的方向，最后我们不得不放弃。

John's mind jumped the track while he was in the play and he forgot his lines.

当约翰在演出时，他的脑子突然乱了套，忘了台词。

The manager's speech really jumped the tracks about halfway through, shifting into a weird commentary on the nature of corporate America.

这位经理的讲话到一半时溜号了，变成了对美国公司性质的怪异评论。

A: Mum, you promised to go to the park with me this Saturday, didn’t you? When will we go?

妈妈，你答应过我一周一起去逛公园的，不是吗？我们什么时候去呀？

B: Tina, you should do your homework intently. I am afraid that your mind has jumpled the track again.

Tina，你应该一心一意地写作业，恐怕你又溜号了吧。

2. Expression：red herring

Explanation：A piece of information or suggestion introduced to draw attention away from the real facts of a situation. （转移注意力的话题，与事实不相符合的论点）

Example：She was drawing a red herring across the path on purpose.

她故意把话题扯到不相干的事情上去。

Whenever he got in a difficulty he would pull a red herring across the track.

一遇到难题，他就用些不相干的事把问题扯开去。

The candidate used the minor issue as a red herring to distract voters from the corruption accusations against him.

这位候选人利用这个小问题来转移选民对他的腐败指控的注意力。

The detectives were following a red herring but they're on the right track now.

侦探们在追踪一条转移注意力的线索，但他们现在的方向是对的。

The mystery novel has a couple of red herrings that keep readers off guard.

那本悬疑小说有几处使读者产生迷惑的地方。