-扩展释义
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鱼鳍式划水(仰卧水面, 两脚并拢, 两手放身旁上下拍水使身体向头的方向移动)
词组
noun
1.A flattened appendage on various parts of the body of many aquatic vertebrates, including fish and cetaceans, and some invertebrates, used for propelling, steering, and balancing.
‘You can see in the photos it’s got a little tail fin.’
‘When overcrowding occurred in the water, some of these fish, using their fins as rudimentary feet, took to the land and changed from gill breathing to lung breathing.’
2.A flattened projection on a device, used for increasing heat transfer.
‘As you can see, they pack the copper fins pretty tight, allowing for pretty good heat dissipation, rated for 938.89 BTU per hour.’
‘This is another idea that in theory should help increase thermal conduction between the base and the fins, since they are all one piece.’
3.A small flattened projecting surface or attachment on an aircraft, rocket, or car, for providing aerodynamic stability.
‘He noticed that the gun fire had damaged what looked like a stabilization fin.’
‘The centrifugal force of the roll causes the fins to unfold for aerodynamic stability in flight.’
4.An underwater swimmer’s flipper.
‘Finally, wear fins on some of your swimming sets.’
‘The next steps involve the whole stroke, removing the fins, underwater kicking to stroke start and finally the block start.’
verb
1.Swim under water by means of flippers.
‘we finned along the side of the wreck’
‘One giant stride later, I was finning slowly towards the hull, watching as it disappeared into the sapphire gloom of 30m of water.’
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noun
‘You can see in the photos it’s got a little tail fin.’
