...主詞補語) (who demand that colleges offer students luxuries unheard of by earlier generations of college students -- single dorm...
...pocket expenses, I am just saying that it is not unheard of that concierge will pull out all the stops for a client. 我並非主張要規定...
for 箱子: Caution: Do NOT stack! for 易碎品: Fragile! Please handle with care. for 不耐壓的地板: (unheard of, but...advise you to get it changed): No heavy load allowed!