Upward skip-level messaging always cascade from child bus to parent bus.
向上的跨级消息传递总是由子级总线依次传递给父级总线。
Downward skip-level messaging always cascade from parent bus to child bus.
向下的跨级消息传递总是由父级总线依次传递给子级总线。
Sometimes students event skip the last one or two lessons to travel with bus for participating in an away game.
甚至有时学生还会缺席最后一节或两节课坐车去客场打比赛。
Sometimes students event skip the last one or two lessons to travel with bus for participating in an away game.
甚至有时学生还会缺席最后一节或两节课坐车去客场打比赛。
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