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1. cetacean  [sɪˋteʃən] 鯨豚目動物

Cetacean is any of an order of aquatic mostly marine mammals that includes the whales, dolphins, porpoises, that have a torpedo-shaped nearly hairless body, paddle-shaped forelimbs but no hind limbs, one or two nares opening externally at the top of the head, and a horizontally flattened tail used for locomotion.

● porpoise鼠海豚

2. rodent   [ˋrodnt] n. 齧齒類動物

Rodents are the largest group of mammals, characterized by upper and lower pairs of ever-growing rootless incisor teeth.

● beaver水獺

● hare野兔

● marmot  土撥鼠

3. canid  n. 犬科動物(= Canidae)

Canid is a lineage of carnivorans that includes domestic dogs, wolves, foxes　and many other extant and extinct dog-like mammals.

● coyote  小狼, 山狗

● jackals  豺狼

4. primate [ˋpraɪmɪt] n. 靈長類動物

Primates are the group of mammals made up of human beings and the animals that resemble them most closely.

● apes 人猿

● gorilla  大猩猩

● chimpanzee  黑猩猩(非洲)

● orangutan  紅猩猩

● baboon  狒狒

5. scavenger [ˋskævɪndʒɚ] n. 食腐動物 (= carrion-feeder)

Vulture, jackals, and some beetles are scavengers, feeding on decaying matter.

● scavenger's cart  掃街車