Sub-specialize means that you've first chosen one area to specialize in, and then chosen an even smaller part of that area to specialize in.
Let's say someone is a car mechanic - that's one kind of specialist. Then maybe ther's a car mechanic who's extra good at brakes, that'll be his sub-specialty.
Once you are a pediatrician you are the top of your field, so there is no more advancement. You could move over into hospital administration, but then you aren't really a pediatrician anymore. You could also potentially subspecialize as well.
In macro terms, the "tax code" is the entire body of laws and regulations covering who pays how much tax on what. In the United States, the tax code is a complex piece of legislation covering multiple volumes of law tomes; lawyers who choose to practice in the area of the tax code tend to subspecialize in areas like individuals being prosecuted for backtaxes or filing for corporations.
4 years undergraduate + 4 years medical school + 1 year internship + 3-5 years anesthesia residency (length depends on whether or not you subspecialize). [12-15 total] You can become a CRNA (certified registered nurse anesthetist) with 4 years undergraduate + post-graduate training of I think 2-4 years. [6 total]
It mean what you don't what does it mean.
Mean is the average.
What does GRI mean? What does GRI mean?
The correct usage is "what DOES it mean"
The haudensaunee mean irguios
he was a mean person who lived with mean people in a mean castle on a mean hill in a mean country in a mean continent in a mean world in a mean solar system in a mean galaxy in a mean universe in a mean dimension
No, but sometimes "average" means "mean" - when it doesn't mean median, geometric mean, or something else entirely.
Present - I mean, She means. Future - I will mean, She will mean. Past - Meant.
He is as mean as a copperhead snakeHe is as mean as an angry bearHe is as mean as a bottle of brandyHe is as mean a black woman