过份艳丽
发表于 2025-4-1 02:05:38
Extraction of Flow Energy by Fish and Birds in a Wavy Streamstream for enhancing their locomotion through the fluid medium. Sea gulls and pelicans have been observed to skim ocean waves over a long distance without making noticeable flapping of their wings as in ordinary flight. In a study of migrating salmon, Osborne (1960) found that an increased flow rate
SOB
发表于 2025-4-1 07:30:48
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AFFIX
发表于 2025-4-1 13:42:45
Hovering Flight of the Dragonfly ,., Kinematics and Aerodynamicsith a motorized camera..The body is held almost horizontal, and the wing stroke plane is tilted 60° relative to the horizontal. In these respects the dragonfly differs strongly from most other hovering animals. The wing beats essentially in the same plane on the downstroke and upstroke. All wings ar
轻弹
发表于 2025-4-1 16:19:23
Muscular and Energetic Aspects of Fish Swimmingined for periods of hours at least, and burst speeds which can only be achieved for a few minutes, means that many fish whose swimming has been studied in the cruise condition exceed 2 × 10. during bursts.
泄露
发表于 2025-4-1 19:08:15
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