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).
mess something up. 1. to do something badly or make mistakes I really messed up my chemistry exam. We had a chance to win the game, but we messed it up. Usage notes: sometimes used in the form mess up on something: I messed up on my driving test.