需求量用英语

quantity demand 的缩写

Qd表示的是需求量，而不是需求。Q即quantity(数量）d即demand(需求）同理你就知道什么是Qs了～

1. 用作名词，有以下两个用法：表示“要求”：They rejected the union demand. 他们拒绝了工会的要求。Aren’t those all reasonable demands? 这些难道不都是合理要求吗?表示“需求”：The supply of apples exceeds the demand this year. 今年的苹果供大于求。There is a great demand for typists. 需要大量的打字员。These goods are in good demand. 这些货物销量很大。There is a great demand for these goods. 对这些货物的需求量很大。She is in great demand as a singer. 作为歌后很受欢迎(from www.yywords.com)。2. 用作动词，意为“要求”、“需求”，通常为及物动词，其宾语可以是名词、不定式、that 从句(从句谓语通常为虚拟的)。如：名词(或代词)：They demanded his release. 他们要求释放他。The workers also demanded higher wages. 工人们还要求提高工资。不定式：She demanded to see the editors. 她要求见编辑。He demanded to be told everything. 他要求把一切都告诉他。从句：I demand that John (should) go there at once. 我要求约翰立即到那里去。They demanded that the right to vote be given to every adult man. 他们要求每个成年人都应有选举权。比较同义句：He demanaded an immediate answer.＝He demanded to get an immediate answer. 他要求马上得到答复。He demanded to be told everything.＝He demanded that he (should) be told everything. 他要求把一切都告诉他。【注】demand可后接不定式，但通常不接不定式的复合结构，若意义上需要这类结构，可换成 that 从句或在 demand 后接 of。如(from www.yywords.com)：他要求她同我们一起去。误：He demanded her to go with us.正：He demanded that she (should) go with us.正：He demanded of her to go with us.3. 表示“向某人要求某物”，可用 demand sth of [from] sb。如：He demanded too high a price of me. 他向我要价太高。He demanded an apology from the boss. 他要求老板道歉。

应该是 quantity，不是 qualityquality 的意思是“质量”，quantity 的意思才是“数量”。

需求量 [词典] quantity demanded; [例句]我们对睡眠的需求量因人而异。The amount of sleep we need varies from person to person