In the study of static comfort, the seat back is designed based on ergonomics theories and optimization theory.

在静态舒适型的研究中，基于人机工程和优化理论，设计符合人体生理曲度的座椅靠背。

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This study has an important value on coupling analysis theory and active-passive vibration control of the human body-seat-boat-water systems.

本文的研究对于人体—座椅—船体—水波耦合系统的理论及其主被动综合控制具有一定的理论价值。

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The combination of cheap jets with greater fuel efficiency and a critical mass of these critters in the sky can, in theory, lower the price per seat considerably.

FORBES: Private Jet Boom