big表达程度深是什么意思?什么是程度深?要例句、large和big的用法区分是什么?

ig 和 large 都是‘大’；一般说来,large 比较正式,有客观标准；big 主观成分较多：
New York is a large city. (说的是地广人多.)
New York is a big city. (想的是脏乱,或是就业机会、文教设施.)
Austin is not a large city; but it’s big enough for a small-town boy like him.
He has a large heart. (心脏大,超过一般标准.)
He has a big heart. (心肠好.)
He has a heart as big as a wheel.
A million dollars is a large sum of money. (美金虽不值钱,壹佰万还是个大数目.)
Ten thousand dollars is a big sum of money for me.
We just received a large/big order from ABC Company.
Put you big feet off my desk. (NOT: large feet)
He wears a big/large wig.