a large quantity of的意思是什么

a large quantity of的意思是：大量的。造句：During the riots, some blackberry owners exchanged messages about targets and police movements, while others used the mass messaging function to spread mass messages encouraging riots.骚乱中，一些黑莓手机拥有者互通声气,商讨攻击目标和通报警方动向,还有人利用群发功

造句：

1. But unlike standard funds, they can be bought and sold during the trading day, so investors can buy and sell assets in a short period of time, rather than buying and selling large amounts of stock securities individually.

   但与标准的基金不同，它可以在交易日内买卖，所以，投资者可以在短时间内进行资产的买进卖出，而不用单独地买卖大量的股票证券。

2. Only by planting lots of trees and grass can soil erosion be prevented.

   只有大量的植树种草，才能防止水土流失。