Nowadays people send far more emails than letters by post.
现今人们发送的电子邮件远多于信件。
With sensor networks this traffic asymmetry is inverted: they send far more data than they receive.
就传感器网络来说,这种通信量的不对称倒过来了:它们发送的数据要远多于它们接收的数据。
With far less controversy, colleges could send messages about canceled classes, delayed buses, campus crises or just the cafeteria menu.
大学可以发送取消课程、公交车延误、校园危机或仅仅餐厅菜单的信息,而免受太多争议。
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