The outbreak of Covid-19 has meant an abrupt change in our life and work.
新冠肺炎疫情的爆发,给我们的生活和工作带来了一个突然的变化。
Such an abrupt change is hard to explain by demography alone, however.
如此剧烈的变化是很难仅仅用人口统计学解释的。
Testing should be repeated immediately if there is an abrupt change in maternal condition.
如果母亲情况突然变化应立即进行检查。
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