Valuing these liabilities is tricky because they stretch many years into the future and their current worth swings wildly in response to small changes in the “discount rate” used to value it.
这类负债需要非常审慎的计价，因为其在未来多年递延，用来定价的“贴现率”哪怕有微小的变化都将对其现值产生巨大的波动。
Regardless of hysteresis of air system, the main factor that influences dynamic response of fuel cell is diffusion concentration polarization, which restricts the change rate of stack current.
不考虑空气系统的时间滞后，影响电池动态响应时间的主要因素为扩散浓差极化，它限制了电流的变化率。
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