这句里的against是什么意思啊?In 2010 Nielsen,a market-research firm,estimated that 45% of Spanish internet users visited illegal music-distribution services,against 23% in the top five European markets

问题描述:

这句里的against是什么意思啊?
In 2010 Nielsen,a market-research firm,estimated that 45% of Spanish internet users visited illegal music-distribution services,against 23% in the top five European markets