a quantity of和quantities of的區(qū)別

quantities of:修飾不可數(shù)名詞時(shí),謂語用復(fù)數(shù)，例如Quantities of food (nuts) were on the table；a quantity of:修飾不可數(shù)名詞時(shí),謂語用單數(shù)。例如A large quantity of beer was sold out。

(1)相同點(diǎn)：① 兩者都可以修飾可數(shù)名詞或不可數(shù)名詞。

②它們的意思都是“大量”

(2)類似：a lot of 和lots of

(3)例句：

①The quantities of each element type will be handy tools for estimating the total effort required.

每種元素類型的數(shù)量對(duì)于估計(jì)所需的總工作量將是便利的工具。

②The government, after this time, did issue contracts to manufacturing companies to produce new quantities of the virus.

在此事件之后,美國(guó)政府,和病毒生產(chǎn)企業(yè)簽了,生產(chǎn)一些病毒的合同。

③And the solution to this equation looks like this where it is written in terms of a quantity called a wavefunction.

這個(gè)方程的解法是,看起來像是寫成數(shù)學(xué)符號(hào)就是,波函數(shù)。

④This kind of migration is tedious and has a high cost in terms of money and time when there is a quantity of data involved.

當(dāng)涉及到大量數(shù)據(jù)的時(shí)候，這種類型的移植操作單調(diào)冗長(zhǎng)而且會(huì)花費(fèi)大量的資金和時(shí)間。