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日期:2024-07-09
The use of fins for the propulsion of aquatic animals can be remarkably effective. It has been calculated that some fish can achieve a propulsive efficiency greater than 90%.[3] Fish can accelerate and maneuver much more effectively than boats or submarin...
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日期:2024-07-09
Go to Fin.com and find the lowest prices on products from online merchants. ... Apple - iPad 2 with Wi-Fi + 3G - 64GB Black - Display 9.7-inch (diagonal) LED-backlit glossy widescreen Multi-Touch display with IPS technology 1024-by-768-pixel resolution at...
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日期:2024-07-11
fin1 top: fins of a typical bony fish bottom: swimming fins fin1 fin 1 (fĭn) n. 1. A membranous appendage extending from the body of a fish or other aquatic animal, used for propelling, steering, or balancing the body in the water. 2. Something resembling...
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日期:2024-07-06
A fin is a thin component or appendage attached to a larger body or structure.
Fins typically function as foils that produce lift or thrust, or provide the ability to ......