1. Schistosome parasites are transmitted to humans through contact with contaminated freshwater.

血吸虫寄生虫通过接触污染的淡水传播给人类。

2. The schistosome lifecycle involves multiple stages, including larval development and reproduction within intermediate hosts.

血吸虫的生命周期涉及到多个阶段，包括在中间宿主体内的幼虫发育和繁殖。