首的英語翻譯：

head; principal; initial; first

次的英語翻譯：

order; second; second-rate
【醫(yī)】 deutero-; deuto-; hyp-; hypo-; meta-; sub-

答辯的英語翻譯：

answer; rejoin; rejoinder; reply; reply to a charge
【法】 ad respondendum; answer; answer the charge; comment on appeal; defence
defend oneself; paper book; plea; plea in abatement; plead; rejoinder
render an account of; reply