I would always inspect WordPress sites and find multiple copies of jQuery that were being enqueued into the page from different plugins and themes.

总是会检查WordPress站点，并发现有多份jQuery副本正从不同的插件和主题中被添面中。

If we want to enqueue someone, that is, add them to the line, we have to traverse down the linked list until we hit the end, and then change that next pointer to point to the new person.

如想将某人入队，也就是将他添行中，必须向下遍历链表直达末尾，然后将 next 指针更改为指向新人。