They are off to a great start.What does "off" mean here?

They are off to a great start.What does "off" mean here? They are off to a great start中的"are off to"是固定搭配吗?如果是,怎么翻译? off to a great start 翻译 They're off to a great start.怎样翻译更恰当? They lit a candle and they are off to a great air show.的翻译 what does "off the wall" mean? what does "shit or get off the pot" mean? get off to a slow start be off to和be off to a great success 英语翻译1.After getting off to a quite interesting start here at begin off start off preparations to get the business off to a good start