数词+形容词+量词
Explanation
"数词+形容词+量词"结构中，形容词放在数词和量词之间，用来修饰量词所表示的事物的大小、长度、形状或数量。
In the "Numeral + Adjective + Measure Word" structure, the adjective is placed between the numeral and measure word to modify the size, length, shape, or quantity of the object indicated by the measure word.
Examples
一大杯茶 一长串葡萄 一小份米饭
a large cup of tea, a long bunch of grapes, a small portion of rice