/ˈru:ɪn ||; ˈruɪn/noun1 [U] the state of being destroyed or very badly damaged 毁灭；灭亡；荒废: The city was in a state of ruin. 那个城市破败不堪。
2 [U] the cause or state of having lost all your money, hope of being successful, etc （金钱、希望等的）完全丧失，丧失的原因，祸因: Many small companies are facing financial ruin. 许多小公司面临破产。
3 [C] the parts of a building that are left standing after it has been destroyed or badly damaged 废墟；遗迹: the ruins of the ancient city of Pompeii 庞贝古城的遗迹
go to rack and ruin→
RACK¹
in ruin(s) badly damaged or destroyed 破败不堪:
After the accident her life seemed to be in ruins. 发生意外以后，她的一生似乎已毁了。