crosswalk指人行道，而sidewalk指旁道，边道。sidewalk[英][ˈsaɪdwɔ:k][美][ˈsaɪdˌwɔk]n.人行道;crosswalk[英][ˈkrɒswɔ:k][美][ˈkrɔ:swɔ:k]n.人行横道（供行人穿越道路用）;