外寄生虫

In 2005, PAH enter China companion animal market by launching revolution, a high efficacy parasiticide for dog and cat.

2005辉瑞物保健集团正式进入中国宠物市场推出了用于驱除犬猫内外寄虫的优质产品-大宠爱。

4 Turbellarians are monoecious with the reproductive systems adapted for internal fertilization. And the monogenetic flukes (class Monogenea) are mostly ectoparasites of fishes.

涡虫是雌雄同的，殖系统适于内受精。单起源的吸虫（单殖纲）大多是鱼的外寄虫。