请将以下内容总结为4句话。 Madagascar, officially the Republic of Madagascar, and previously known as the Malagasy Republic, is an island country in the Indian Ocean, approximately 400 kilometres (250 miles) off the coast of Southeast Africa. At 587,041 square kilometres (226,658 sq mi), it is the world's second-largest island country, behind Indonesia. Due to its isolation, more than 90% of its wildlife is found nowhere else on Earth. The country has the National Assembly and other state organs, and runs a market economy.
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马达加斯加，官方名称为马达加斯加共和国，原称马尔加什共和国，是一个位于印度洋的岛国，距非洲东南岸约400公里。该国是世界上仅次于印度尼西亚的第二大岛国，面积达587,041平方公里。由于其地理位置的隔离，超过90%的野生动植物在其他地方并不存在。马达加斯加拥有国民议会等国家机构，并实行市场经济。
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