随着钢琴越来越普及，古典音乐也随之进入了中产阶级的生活，而在此之前，古典音乐只是为上层阶级创作的。
As pianos became more available, they brought classical music, the music which previously had been composed only for the upper classes, into the lives of the middle-class people as well.
现在电脑越来越普及了。
有一点是确信的：传感器技术将越来越普及。
One thing is for certain: sensor technology will become as pervasive as HP Labs says it will, in due course.
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