In particular, the large and rich colonies of honeybees are a very rewarding target for a great variety of predators and parasites.
在自然界中,动物所面临的生存威胁主要来自于捕食者和寄生生物。
The exploration and discussion on teaching materials of microbiology and parasitology in secondary vocational and health education;
中等卫生职业教育微生物与寄生虫学科教材探讨