试听180秒托福真题第2套-生物类词汇：鲸鱼的起源（加强版）

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obvious=ob+vi+ous

mammal=mamm+al

disguise=dis+guis+e

functional=funct+ion+al

extinct+ex+(s)tinct

marine=mar+ine

intermediate=inter+medi+ate

transitional=trans+it+ion+al

reconstruct=re+con+struct

ancestor=an+ces+tor

precious=preci+ous

adaptation=ad+apt+ation

exposed+ex+pos+ed

retain=re+tain

propulsion=pro+puls+ion