A.a large number of B、a great deal of C、a large quantity of D、a great many这几个词的区别.

a great deal
adv.
1.to a very great degree or extent
2.frequently or in great quantities
a great number of 许多(后接可数名词复数)
a large amount of (接不可数名词)大量
a plenty of adj.很多(许多)能否用中文解释一下，看不懂，谢谢。