系CII教材中的几个数，但怎么也看不懂，理解不来。
GNWP    Gross net written premium
gross written premium net of policy cancellations and outwards reinsurance premiums but gross of commissions and expenses
GNWPI    Gross net written premium income
gross written premium less only returned premiums and less premiums paid for reinsurance that insure to the benefit of the cover in question.
GNEP    Gross net earned premium
gross earned premium less any policy cancellations and outwards reinsurance premiums but inclusive of commissions and expenses.

跪谢