Of course, electronic sensors have been around for some time, but something has changed: a sharp decline in the cost of sensors and, thanks to advances in cloud computing, a rapid decrease in the cost of storing and processing data.
当然，传感器 已经存在了一段时间了， 但是不同的是， 感应器价格的急剧下降 还有多亏了云计算的发展， 储存和处理数据的价格 大大下降了。