单词	delta
释义	deltadelta /ˈdɛltə/ noun [countable] Etymology ETYMOLOGYdelta Origin: 1300-1400 Greek, from a %Semitic% language 1 earth science, geography an area of low land where a river spreads into many smaller rivers near the ocean:  the Mississippi delta2eng. lang. arts the fourth letter of the Greek alphabet
随便看	oral exam oral history orally oral sex oral surgeon oral tradition orange orangeade orangery orangutan oration orator oratorical oratorically oratorio oratory orb orbit orbital orbiter orchard orchestra orchestral orchestra pit orchestrate

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