Both the index duration and the spread duration are the decreasing functions of the discount margin.

利率久期和利差久期都是贴现利差的递减函数。

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The difference between the rates, 20 points in this case, is known as the "spread" or "margin".

买进和卖出汇率的差额------以这里20点为例称为“差幅”。

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The pain can radiate around the costal margin into the back or can spread to the region of the scapula. Jaundice and fever often occurs in some cases.

但胆道疾病的疼痛多在高脂饮食后发生，疼痛常自胃脘部放射至右季肋及右肩，部分患者伴有黄疸及发热。

youdao

And keep in mind that while the spread between the two projections represents real money, it is margin-of-error stuff when it comes to the size of the federal budget and total health spending.

FORBES: Move up http://i.forbesimg.com t Move down

First and foremost, ever-present low interest rates have squeezed bank profitability as measured by net interest margin, or the spread between what banks pay to borrow and what they're paid to lend.

WSJ: Standard & Poor's 500 Had a Good Year in 2011 -- If You Don't Count Too-Big-To-Fail Banks