目的描述人工灌溉区钉螺生长繁殖特征，为实施生态学方法控制钉螺提供理论依据。
Objective to explore the rule of growth and multiplication of snails in man made irrigation, and thus to provide evidence for snail control with ecological method.
生物学、生态学、生物化学等应用领域中的许多模型都可以用非线性时滞反应扩散方程来描述。
Many models in various field of applications, such as biology, ecology and biochemistry, can be described by nonlinear reaction-diffusion equations with time delays.
描述性的生态学是干燥无味的课题。
现代生态学则具有（1）从描述性科学走向实验科学；
There are four distinct characters to modern ecology: (1)From descriptive discipline to experimental discipline;
现代生态学则具有（1）从描述性科学走向实验科学；
There are four distinct characters to modern ecology: (1)From descriptive discipline to experimental discipline;
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