Unlike most modern surfboards, all boards were finless, requiring surfers to drags their hands or feet to turn.
与大多数现代冲浪板不同,所有的冲浪板都是无鳍的,冲浪者需要拖着手或脚才能转动。
The finless porpoise, known as the " giant panda of the water, " is a barometer of the ecological environment in the Yangtze River basin.
江豚被誉为“水中大熊猫”,是长江流域生态环境的晴雨表。
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