The vast majority of bacteria do not cause disease, and many bacteria are actually helpful and even necessary for good health. These bacteria are sometimes referred to as âgood bacteriaâ or âhealthy bacteria.â. Harmful bacteria that cause bacterial infections and disease are called pathogenic bacteria.
catch-up adjective [before noun]. âº used to âdescribe something that âhelps you âreach the same âstandard or âstage as âothers, usually after you have âmissed something such as âlessons or âopportunities to âpractise: catch-up âexercises/âsessions. the âprocess of âtrying to âreach the same âstandard or âquality as someone or something else when they have become more âadvanced or âsuccessful: I'm playing catch-up because of the weeks of âtraining I have missed. (Definition of catch up from the Cambridge Business English Dictionary Â© Cambridge University Press).
A shortened version of What's up, which replaces greetings such as Hello, How are you?, What's going on?, etc. This phrase was possibly made popular in the 1940's from a cartoon called Bugs Bunny, when the rabbit said his famous catch phrase, Eh...What's up, doc?. If you are not a social recluse then you will most likely be asked Whatsup?