It takes part in bus communication, but when an error has been detected a passive error flag shall be sent.
它能参与正常通信，但当检测到错误时发送的是被动错误标志。
2
Recent years, the passive safety of large bus and coach has been studied deeply by foreign countries, and good effects have been achieved.
近年来，国外大客车被动安全研究进展迅速，并取得了良好的效果。
3
To ensure driving safely, a large quantity of active and passive safety devices are widely used on coaches, which greatly improve bus safety than before.