parasitic monster

例句：

1. 1. Parasites can cause serious health problems in their hosts.
   寄生虫可以在宿主体内引起严重的健康问题。
2. 2.The parasite is causing the host to suffer from severe pain.
   这种寄生虫正在使宿主遭受剧烈的疼痛。
3. 3. Parasites are often found in environments where there is a shortage of food and water.
   寄生虫通常在食物和水短缺的环境中被发现。