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今天我们要学的词是 erosion。Erosion 的意思是侵蚀、腐蚀。A new high-speed rail station linking Hong Kong and mainland China opened under Beijing authority, raising new worries among Hong Kong residents of a further erosion of the territory's autonomy，连接香港与中国大陆的高铁在香港境内的高铁站启用，但受北京当局管辖，引起香港居民对自治权进一步受到侵蚀的担忧。A study last year concluded sediment from erosion following fires would more than double by 2050 for about a third of western watersheds，去年的一项研究表明，火灾后地表侵蚀的沉积物在2050年前将在大约三分之一美国西部水域增加一倍以上。
