彻底的现场调查发现，在出现症状前一周期间，病人和邻居家中发生鸡、鸭死亡。
A thorough field investigation found that chicken and duck deaths occurred in the patient's household and neighborhood during the week prior to symptom onset.
你可以和昨天或者一周前的同一时间窗口内的操作进行对比，从中可以观察到应用程序的改进过程。
For every operation you can compare to the same time window yesterday and a week ago so you can follow the behavior as your application changes.
我们应在一周前预先订一间房间。
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