urgency这个英语单词的词性是名词，urgency的名词含义为紧急，催促，紧急的事。
例句：
The rainy season is coming. It's a matter of great urgency to repair the drainage and irrigation equipment.
雨季就要到了，修理排灌设备是急如星火的任务。
He was boiling hot all over, his mind tense with a great sense of urgency.
他全身滚热，心急如焚。
In case of urgency, call the police.
一旦发生紧急情况，打电话给警察。