polygenetic多時(shí): a long time代: take the place of; be in pla ...的: 4次方是 The fourth power of 2 i ...當(dāng)代的，同時(shí)代的: contemporary冰川時(shí)代的: glacial下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
