The doping ions with various valences were selected to verify the charge compensation effect on the luminescence intensity as K and al seem to have similar charge compensation effect.

选择不同价态补偿离子掺杂是为了研究电荷补偿作用机制对该类材料发光性能的作用。

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The U. K. will charge banks 0.50% plus the historical cost of default insurance on the bank's debt.

除银行债务违约保险的通常成本之外，英国还将收取0.5%的额外费用。

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The Department of Labor, which oversees retirement plans, has been working for years on rules that would make it easier to tell which 401(k) plans charge unreasonable fees.

FORBES: Will We Ever Find Out What We Pay In Retirement Fees?

The yardstick is simple: A great 401(k) plan will charge you about 0.29%.

FORBES: You Can Find a Safe Retirement IRA

At long last, mutual funds have to disclose the fees they charge to 401(k) account holders.

WSJ: How Companies Stack the Deck Against You With Fine Print