| 释义 |
dugong 英/ ?du?ɡ??; ?dju?ɡ?? / 美/ ?du?ɡɑ?? / - 1
Flippers may indeed be a necessary response to aquatic life, turtles, whales, and dugongs also have them. 鳍状肢可能确实是水生生物的必要反应，海龟、鲸鱼和儒艮也有鳍状肢。 - 2
They show us what the intermediates might have been like, on the way to extreme cases such as whales and dugongs. 它们向我们展示了进化过程中半成品的样貌，而完全进化的结果是鲸鱼和儒艮。 - 3
However, they are, in one respect, less fully given back to the water than whales or dugongs, for turtles still lay their eggs on beaches. 然而，从某种程度上讲，海龟并没有像鲸鱼或儒艮一样完全回到水中生活，因为它们依旧在海滩上产卵。
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