quantity
n.量，數量; 定量，大批; 數目; [語音學、韻律學] (指母音或音節的長短) 音量;
[例句]He had quantity and quality!
他既有數量,又有數量!
a large quantity of 和large quantities of的用法區別
quantities of無論修飾可數還是不可數名詞、謂語動詞都用複數.
例如:
Quantities of food (nuts) were on the table.桌子上有許多食品(堅果).
a quantity of+可數名詞複數、謂語動詞用複數;+不可數名詞、謂語動詞用單數.即修飾可數或不可數名詞均可,作主語時採取就近一致的原則,其謂語動詞通常與短語中of後面的'名詞的數保持一致.