The first recorded use of applecart being used in this way appeared in 1788.

次有记载的" applecart" 的这用法出现在1788年。

In American English, you have upset the applecart if you ruin someone's plans or go against the usual way of doing things.

在美语里，如果你毁了别人的计划或者不遵循常的做法，你就" 打乱安排" 。

But the verb used with the applecart expression is usually upset.

" 但和" 苹果车（applecart）" 表达连用的动词经常" 扰乱（upset）" 。

This is where a vehicle called an applecart enters the story.

这就叫苹果车的交通工具诞生的历史时候。

In fact, the Merriam-Webster Dictionary defines an applecart as a plan, system, or situation that may be disrupted or ended.

事实上，韦氏词典里" applecart" 的定义" 个计划或者局面被扰乱了或者被中断了。

It must have been a big mistake years ago to upset or overturn someone's applecart.

多年前惹恼某人、搅乱某人的计划，定个大错误。