1. Explosives were set off to test if the ship can handle the stress that it would face under battle conditions.
set off 出发;动身;使...爆炸
They were going to set off in the fog, but were dissuaded.
他们原打算在雾中出发,但被劝阻了
。2. Flooding and severe weather damage from the tropical storm are reported across Alabama.
severe weather 恶劣天气
Work on the building was impeded by severe weather.
楼房的施工因天气恶劣而停了下来
。