be off的意思？

Whoops, it's past 11, I'd better be off home.哎呀，11点多了，我最好还是回家吧。It's not like you to be off your food.胃口不好，这可不像你了。Well, I'd better be off. Good day to you.好啦，我得走了，再见。...

be off的音标：be off的英式发音音标为：[bi: ɔf]be off的美式发音音标为：[bi ɔf]...