Berkshire said last week that quarterly profit plunged 64 percent to the lowest since 2005 as the company marked down the value of derivative contracts.

伯克希尔上周的季报中称其利润因公司降低衍生合约的价格而下滑64%，降至2005年以来的最低点。

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For example, if it's the first week of calculus, you might record the standard derivative equation I reproduced above.

举例来说，如果现在是教授微积分的第一个星期，你可能会记录我上面提到过的导数方程。

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Week 6 The derivative of implicit function. the function's derivate by parameter equation.

第6周隐函数的导数。 由参数方程所确定的函数的倒数。数学实验一。 二。

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Since the last week of September the apparent risk of a Commerzbank default, on the basis of derivative prices, has nearly trebled (see chart).

ECONOMIST: Commerzbank