But most active modern angels look like ordinary men and women: the man sitting in the cafe, the woman crossing the street, the teenager next in line at the bus stop.
The prior various crossing adopt electric bells or ordinary transistor audible devices, and have the problems of difficult volume adjustment, large noise disturbance, etc.
目前各类道口采用的电铃及一般晶体管音响装置，存在着音量不易调整，噪音干扰大等问题。
3
The bottom of the basin is very wide and flat so that it feels like crossing an ordinary plateau.