a quantity of和quantities of的区别
quantities of：修饰不可数名词时，谓语用复数，例如Quantities of food (nuts) were on the table；a quantity of：修饰不可数名词时，谓语用单数。例如A large quantity of beer was sold out。
quantities of：修饰不可数名词时，谓语用复数，例如Quantities of food (nuts) were on the table；a quantity of：修饰不可数名词时，谓语用单数。例如A large quantity of beer was sold out。
1、相同点：
①两者都可以修饰可数名词或不可数名词。
②它们的意思都是“大量”。
2、类似：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.
每种元素类型的数量对于估计所需的总工作量将是便利的工具。
②And the solution to this equation looks like this where it is written in
terms of a quantity called a wavefunction.
这个方程的解法是,看起来像是写成数学符号就是,波函数。
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