cataclysm

n sudden violentchange or disaster, eg a flood, an earthquake, a revolution or a war 突发的剧烈变动或灾难（如洪水、 地震、 革命或战争）.

castor sugar (also caster sugar), castrate, castration, casual, casually, casualness, casuals, casualty, casualy, casuist, casuistic, casuistically, casuistry, casus belli, cat, cat burglar, cat out of the bag, cat's-cradle, Cat's-eye, cat-o-nine-tails, cataclysmic, catacombs, catafalque, catalepsy, cataleptic, catalog, catalogue, catalogue (US also catalog), catalysis, catalyst, catalytic, catalyze, catamaran, catapult, cataract, catarrh, catastrophe, catastrophic, catastrophically, catcall,