Economic models often lead to the study of systems of equations.

经济模型经常导致对方程组的研究。

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We have already stated that our main concern will be the study of systems for which linear, time-invariant differential equations provide a useful model.

前已指出：我们主要关心的是用线性、时不变微分方程作为实用的模型系统。

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Scientists and engineers are beginning to study this ability of fishes in the hope of designing more efficient propulsion systems for ships.

科学家和工程师们开始研究鱼类的这种能力，希望能设计出更有效的船舶推进系统。

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The study says mangrove trees provide more than one and a half billion dollars worth of services to ecological systems worldwide.

VOA: special.2010.04.20

It's the study of existing, conventional, communicative systems.

它是关于现存的，常用的，有交流功能的系统的研究。

耶鲁公开课 - 文学理论导论课程节选

That study is Systems Physiology and that's an important subdivision of Biomedical Engineering.

这项研究叫做系统生理学,它是生物医学工程的一个重要分支

耶鲁公开课 - 生物医学工程探索课程节选

This course is taught by Scott E Page, the Leonid Hurwicz Collegiate Professor of Complex Systems, Political Science, and Economics at the University of Michigan where he directs the Center for the Study of Complex Systems.

FORBES: Learn How Model Thinking Can Make You a Better Thinker

Current municipal traffic monitoring systems study individual stretches of road that use induction loops to sense the passage of cars, or complex camera systems that capture licence plates.

BBC: Tech that trumps traffic tangles

This type of impact by top-of-the-food-chain predators on lower trophic levels is well known in marine systems, said Peterson, and has been shown to occur in terrestrial systems in the study of invertebrates.

CNN: Wolf response to climate change studied