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A cetacean is a mammal that lives in the sea. The group includes whales, dolphins, and . They can look a bit like fish, but they are not fish: they come up for air, they are , and the babies drink milk. Scientists and nature programmes like the tidy group name; in ordinary talk, people just say whale or dolphin. The same word can be an adjective: cetacean bones, cetacean songs. It sounds like classroom or museum English, not everyday chat.
鯨豚類
組成From the scientific name Cetacea, from Latin cētus (“whale”) + -an (“of that kind”).
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
cetaceanadj/sɪˈteɪʃən/
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Pertaining to the zoologic infraorder Cetacea, or associated with species falling under that taxonomic hierarchy.
- The poached blubber was definitely cetacean in origin, but the particular species could not be identified.
- She was not as demure as she was in Roanoke; she seemed at the beginning rather like she felt more comfortable in the oceanic atmosphere harpooning her opponent. Indeed, at times, it seemed she was Ahab and the witherwin Allen was her Moby Dick; but while she sails her Pequod just as intently toward a singular goal, her alastor is much less clear and she bears no visible scars of a cetacean attacker.
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Resembling or relating to large aquatic mammals.
- The obese woman, ungainly on land, moved with a kind of cetacean grace in the water.
- […] I would propose that external dependencies to the document would be automatically downloaded if a local copy doesn't exist so that the core distribution no longer is quite so cetacean in size.
cetaceannoun/sɪˈteɪʃən/
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A marine mammal belonging to the infraorder Cetacea, including dolphins, porpoises, and whales, characterized by a streamlined body, one or two blowholes, tail flukes, and fin-like forelimbs without hind limbs.
- The tour promised spiritual experiences with humpback whales and other cetaceans, but all we saw were seagulls and a dead sea otter.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。