这还未算上一种叫做期权可变利率的按揭贷款（option ARM），它毒性很强，但很多情况下和次优按揭基本相同。 加上它的话，损失将达1兆亿美元。

Add in option ARMs, a particularly virulent type of adjustable-rate loan, many of which are essentially the same as Alt-A, and the potential hit climbs towards $1 trillion.

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就像前面说的，固定不变的凸轮轴只为了某个转速进行优化，马自达的可变相位拓展了这个区间(蓝线)，但是却在低转速和高转速的时候损失了一些扭矩。

As was said, a static camshaft can only be optimized for one RPM. Mazda's variable phasing broadens this range (blue line), but torque still drops at low and high RPMs.

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