Acquaintance: Somebody known or met before.
I am contacting several of my acquaintance to see if there are some job opportunities.
I don't know him well, but he's one of my acquaintances.
I'm not impressed with(不喜欢） several of his acquaintances, so I won't recommend him for the job.
Appearance: How something looks, what something looks like.
He could improve his appearance by buying some new clothes.
He doesn't care about his appearance.
We could tell from his appearance that he wasn't feeling well.
Consequence: An outcome or result.
Many forms of life would become extinct as a consequence of global warming.
One consequence of his drinking has been the poor quality of his work.
We are all suffering from the consequence of his reckless （鲁莽的）investments.
Factor：something that affects or influences the end of result.
One factor that needs to be considered is his arrogant personality.
Her health is one factor that we can't afford to ignore.
An important factor in their decision not to invest was the lack of good leadership.
Exception: to be unique or treated differently.
Everyone has to be in the office before nine o'clock with the exception of sales department.
I'm sorry but I can't make an exception and allow you to bring a dog to the office.
Without exception, I'd like to congratulate everyone for their outstanding work.