1/disaster释义：
n. 灾难，灾祸；不幸
2/例句：
In recent years, the number of natural disasters has increased all over the world.
近年来，世界各地的自然灾害数量都有上升。
3/有：
natural disaster自然灾难，自然灾害
disaster relief赈灾；灾难援助
disaster prevention防灾
disaster area灾区
earthquake disaster地震灾害。
