premium是什么意思？

Malpractice awards do drive up insurance premiums for doctors in high-risk specialties, and there is some evidence that doctors engage in defensive medicine by performing tests and treatments primarily to prove they are not negligent should they get sued.

Americans are deeply concerned about the relentless rise in health care costs and health insurance premiums.

But a look at the prices on online grocer Fresh direct suggests a grass-fed premium of anywhere from 35-60%.

Joseph says his products are priced 10-20% above organic versions, but depending on the product chosen, compared to non-organic conventional yogurt, consumers could pay a premium of 30-50% or more for grass-fed.