All these laid down a soild foundation for researches on aphid metabolism, identification of insecticide, the physiological and biochemical resistance mechanism of crops to aphid.

这为进一步深入研究蚜虫生理代谢、测定杀虫剂效果和探讨作物抗蚜生理生化机理等奠定了实验技术基础。

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Engineering is based principally on physics, chemistry, and mathematics and their extensions into materials science, soild and fluid mechanics, thermodynamics, and systems analysis.

物理学、化学、数学，以及这些学科扩展出的物质科学、固体物理、流体力学、热力学和系统分析等等学科是工程学的重要基础。

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