一月是一年的第一个月。

January is the first month of a year.

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许多人生病了。在今年的一月到四月，这座城市被封锁，以防止病毒进一步传播到其他地方。

Many people got ill. This year the city was locked down from January to April to prevent the virus from spreading further to other places.

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1877年一月到三月，他在巴黎历史最悠久的火车站创作了一系列火车画作。

He created paintings of trains between January and March in 1877, at the train station with the longest history in Paris.

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