quantity
n.量，数量; 定量，大批; 数目; [语音学、韵律学] (指元音或音节的长短) 音量;
[例句]He had quantity and quality!
他既有数量,又有数量!
a large quantity of 和large quantities of的用法区别
quantities of无论修饰可数还是不可数名词、谓语动词都用复数.
例如:
Quantities of food (nuts) were on the table.桌子上有许多食品(坚果).
a quantity of+可数名词复数、谓语动词用复数;+不可数名词、谓语动词用单数.即修饰可数或不可数名词均可,作主语时采取就近一致的'原则,其谓语动词通常与短语中of后面的名词的数保持一致.