ounce          
noun uk/aʊns/ us/aʊns/
C1 [ C ] (written abbreviation oz)盎司(重量单位,1盎司约等于28克) 
a unit of weight equal to approximately 28 grams
  There are 16 ounces in one pound. 1磅等于16盎司。 
 a twelve-oz pack of bacon 一包12盎司的熏猪肉 
 C2 [ S ] informal一点点,少量,少许 
a very small amount
  She can eat as much as she wants and she never puts on an ounce (= her weight does not increase). 她可以想吃多少就吃多少,体重却一点儿都不长。 
 If he has an ounce of common sense, he'll realize that this project is bound to fail. 要是他稍稍有一点儿常识,就会意识到这项计划注定要失败。 
 - More examples
 - Measure out eight ounces of flour.
 - The recipe needs three and a half ounces of soft brown sugar - that's about 100 grams.
 - Daniel weighed a healthy eight pounds and ten ounces when he was born.
 - Our best Beluga caviar costs $105 for one ounce.
 - The salesman showed me an amazing little music player weighing only a few ounces.