I don't really understand how to use bzw. As the title. There are 2 examples in my dictionary: 1. Die Kandidaten kommen aus München bzw. Köln. so in this sentence, it's more like "either"? or "or"? 2. Ich könnte Sie heute bzw. morgen besuchen. in here is "or"? Now the question is, what's the difference between "or" and "bzw."? And in which circumstance that I can only use "bzw." not "or"?? Thanks