calamitous accident矿山灾害
sudden calamitous突发性灾害
calamitous climate灾害气候
calamitous landform灾害地貌
calamitous natural phenomena灾害性自然现象
sudden calamitous weather突发性灾害天气
the calamitous study灾荒研究
service for calamitous areas灾区救护团
calamitous weather forecast灾害性天气预报
ADJ（形容词） If you describe an event or situation as calamitous, you mean it is very unfortunate or serious. 灾难的 [正式]
...the calamitous state of the country.
...该国家的悲惨境况。