结果大量易感人群的积累、接种质量不高以及疫情上报不及时是导致这两起麻疹爆发的主要原因。
Results Cumulation of many susceptible population, low vaccination quality and late reports of epidemic situation were the main causes of 2 measles outbreaks.
美国邮政周三上午宣布：“由于北极地区疫情的爆发，以及对美国邮政雇员安全的担忧，1月30日邮政将暂停大约3位数邮政编码地区的邮递服务。”
"Due to this arctic outbreak and concerns for the safety of USPS emplovees," USPS announced Wednesday morning," the Postal Service is suspending delivery Jan.30 in some 3 digit ZIP Code locations."
以下图标显示疫情之前学生的活动以及现在学生的活动。
The diagrams below show the activities the students did before the pandemic (疫情之前) and the activities they do now.
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