2.out ad.出外;向外→outdoorsad.在户外,在野外→outera.外部的,外面的→outingn.郊游,远足→outsidead.在外面prep.在…外面→outwardad.向外的,外出的 3.overprep.越过ad.越过→overcoatn.大衣→overcomev.克服,解决→overheada.在头顶上→overlookv.忽略,不予理会→overseasad.在...