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。

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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。

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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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However England have lost the opening three one-day fixtures and need an abrupt change of form to make the seven-match series competitive.

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Such an abrupt change is hard to explain by demography alone, however.

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"She was living with her parents before that, and no-one could have foreseen such an abrupt change in her behaviour, " Mr Farias told Clarin newspaper.

BBC: Latin America & Caribbean