“自备”的意思是自己准备、自己带上需要的东西，不用别人给你。

"自备" means to prepare or bring what you need yourself, without relying on others.

我们常常在通知或广告上看到这个词，比如“请自备水杯”。

We often see this word in notices or advertisements, such as "请自备水杯" (please bring your own cup).