old school

school one attended as a boy or girl （中小学的）母校. old school `tie (esp Brit) 1 tie worn by former pupils of a particular school （某中学的）校友领带. 2 (fig 比喻) symbol of excessive or sentimental loyalty to traditional values, ideas, etc （对传统价值观、 思想等极度忠诚的）守旧标志.

okay (also OK), okey, okra, old, old age, old boy, old boy (fem 阴性作 `old girl), Old English, old fogey (US old fogy), old folk, old folks' home, old girl, Old Glory, Old Harry (also Old Nick, Old Scratch), old lady, old lag, old maid, old man, old man's beard, old master, old stager, old sweat, old woman, old-fashioned, old-maidish, old-time, old-timer, old-world, olden, oldie, oldish, oldster, oleaginous, oleander, olfaction, olfactory, oligarch, oligarchy, olive, olive oil,