The main reason of infecting Sparganum mansoni is by eating alive tadpoles in some people.
当地居民生食蝌蚪，是感染曼氏裂头蚴病的主要
。
The main reason of infecting Sparganum mansoni is by eating alive tadpoles in some people.
当地居民生食蝌蚪，是感染曼氏裂头蚴病的主要。
明：以上例
、词性分类
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