根据法律，发生火灾的集合地必须有明确的标志。
By law, the assembly point in case of fire must be clearly marked.
绿色小人向一扇门奔跑，标志的一侧有箭头，这是告诉所有的人紧急出口的方向，告诉宝宝一旦遇到火灾等，要向箭头指引的方向跑。
The little green men to a door run, mark on one side of the arrow, this is tell everyone in the direction of emergency exit, to tell the baby once encountered fire, to the arrow direction to run.
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