Bu kazaya neyin sebep olduğu tam bir sır.
- It is a complete mystery what caused the accident.
Genellikle öngörülemeyen hava tarafından kazaya sebep olundu.
- The accident was caused chiefly by the unpredictable weather.
... which disrupted energy prices and caused consumers to have to ...
... from the kinds of things that caused big mammals to become extinct ...