You know, we describe Sentinel as a pandemic preemption system, and here we are in a pandemic.

PS：你知道， 我们将 Sentinel 描述为一个大流行病先发制人系统，而我们现在正处于大流行病中。

The preemption of state law that is inconsistent with federal law is easy to understand as an operation of the supremacy clause.

与联邦法一致的州法优先购买很容易理解为至高无上条款的运作。

Perhaps the fuzziest area of preemption doctrine concerns cases within the powers of Congress in areas within which Congress has not yet legislated.

许优先购买原则最模糊的领域涉及国会权力范围内的件，件涉及国会尚未立法的领域。

Todaythe allocation of authority between the national and state governments is controlled by the doctrine of preemption, including the puzzling effect of dormant federal powers.

今天，国家政府和州政府之间的权力分配受到优先购买原则的控制，包括休眠的联邦权力的令人费解的影响。

Such a preemption, like that of a traveller's bag in the rack, was unquestionable; and, for additional evidence, sitting with her knees crossed, she kept one foot continuously moving a little, in cadence with the other, which tapped the floor.

种先发制人，就像行李架上的旅行包一样，是毋庸置疑的；为了进一步证明，她双膝交叉坐着，一只脚停地移动一点，与另一只脚的节奏一致，另一只脚敲打着地板。