Schistosomiasis, or bilharzia, is a parasitic disease caused by trematode flatworms of the genus Schistosoma.
血吸虫病（又称裂体吸虫病）是由裂体吸虫属血吸虫引起的一种寄生虫病。
Flatworms such as these are just one of the 33, 000 known species in Japanese waters.
像这样的扁虫只是日本水域中33000已知的物种之一。
Flatworms such as these are just one of the 33, 000 known species in Japanese waters.
像这样的扁虫只是日本水域中33000已知的物种之一。
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