ounce
/auns; aʊns/ n
1 [C] (abbr 缩写 oz) unit of weight, one sixteenth of a pound, equal to 28.35 grams 盎司（1/16 磅, 等於28.35克）. =>App 5 见附录5.
2 [sing] ~ of sth (infml 口) (used esp with neg vs 尤与动词否定式连用) very small quantity of sth; any 少量; 一点
She hasn't an ounce of common sense. 她一点儿常识也没有.
There's not an ounce of truth in his story. 他说的没有一点儿是真的.