对于例外准确的诊断结果因其对控制措施的影响而十分重要的情况，实验室网络正在提供后援支持。
The laboratory network is providing backup support for situations in which exceptionally precise diagnostic results are important because of the implications for control measures.
唯有美国疾病预防控制中心的流行病学家戴维·威廉姆森例外。
David Williamson, an epidemiologist at the Centers for Disease Control and Prevention (CDC), was the lone exception.
前三个钩子几乎不需要解释，但有一个例外：flitter_update中的if语句确定版本控制是否启用。
The former three hooks require little explanation, with one exception: the if statement in flitter_update determines whether versioning is enabled.
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