a very large number of许许多多的;一笔很大的数目;许多;意为
a fairly large number of相当大一部分
A particularly large number of特别多
A large number of operations大量作业
A large number of fans大量的歌迷
A large number of zipper大量拉链
A large number of drainage有大量排水处
a large number of animal大量的动物
a large number of image大量图像
Then,use a large number of numeral pattern to train BP network.
然后 ,使用大量数字样本对BP网络进行训练。
参考来源 - 基于BP网络的手写体数字识别方法