objective

n.目标，宗旨 a.客观的；外界的，真实的

obedience, obedient, obediently, obeisance, obelisk, obese, obesity, obey, obfuscate, obfuscation, obiter dictum, obituary, object, object glass, object lens, object lesson, object to, object to sth., objection, objectionable, objectionably, objectively, objectivity, objector, objet d'art, oblate, obligate, obligation, obligatory, oblige, obliged, obliging, obligingly, oblique, oblique angle, obliquely, obliqueness, obliquity, obliterate, obliteration, oblivion,