下图演示了数据在测试驱动器与被测试系统之间的流动。

The illustration below shows how the data flows between test drivers and the system under test.

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但有些测试不仅仅会查总值，还会查到“游离PS A”值，会在血液中自由流动。

But some tests measure not only total PSA, but another component called free PSA, which floats unbound in the blood.

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不可思议的是，压力测试竟没有覆盖到很多雷曼最不流动的资产。

Incredibly, stress tests failed to include many of Lehman's most illiquid assets.

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