英语词汇wetland ecosystem简单造句、意思、用法及例句-英语例句辞典

单词	wetland ecosystem
例句	原声例句当月 CNN 10 学生英语 Which of these national parks is the largest wetland ecosystem in the U.S.? 以下哪个国家公园是美国最大的湿地生态系统？
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英语例句辞典收录519880条英汉例句词条，基本涵盖了全部常用单词的造句方法及例句，是英语学习的有利工具。