premium grade

基本解释

Our Tall Venice Boots are manufactured from premium grade sheepskin pelts.
我們的高的威尼斯靴子被由高級的等級毛皮制造成。
dict.cn
The paper inhibitor was heavy premium grade art paper of 0.0095 inch (0.24mm) thickness.
文件抑制劑是沉重的保費級銅版紙的0.0095英寸（ 0.24毫米）厚度。
Additional charges for oil should only be made if more than four liters are used, or if the customer requests a premium grade oil (such as a synthetic oil).
衹是在使用四陞以上的油或顧客要求優質油（如郃成油）時才應該收取額外的郵費。

According to the EPA, a motorist who drives the Volt exclusively on electric power will pay an estimated 4 cents per mile in energy costs, while one who never recharges the battery and runs the car exclusively on gasoline (with premium grade required) will pay 9 cents per mile.
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My analysis indicates, rather, that the risk premium on investment grade corporates is generous, making that group attractive by comparison.
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There's evidence that the risk premium is peaking for investment grade corporate debt.
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