If you're not currently an expert at something, you need to change that; you should develop at least one area of expertise in your lifetime.
The handwriting expert attested to the genuineness of the signature.
You can't explore effectively without somebody who is an expert at similar terrain -- that's the customer.
More recently, in what Sara Mead, an education expert at the New America Foundation, calls a "man bites dog" sensation, public and parental concerns have shifted to boys.
She is recognized by some people as an expert at how to deal with extramarital love.
"and all the boatmen, the seamen and those who are expert at guiding a ship through the sea, will come down from their ships and take their places on the land;"
One is renowned for his hard, straight shot while the other is an expert at curling the ball around walls.
Telephony services such as Skype could also be particularly affected, thinks Professor Andy Nix, a wireless expert at Bristol University.
You have to be good but not an expert at everything you do, and you have to know when to be flexible and when to ask for help.
I attended the business diligently, studied accounts, and grew, in a little time, expert at selling.
She is expert at Chinese boxing.; She is expert at martial arts.
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