这个标识代表什么意思?What does this sign mean?

这个标识代表什么意思?What does this sign mean?
儿童禁止穿行Children are prohibited to cross
注意前方道路上可能有儿童穿行Watch for children crossing
注意上年纪的行人Watch for aged pedestrians
行人禁止通过Pedestrians are not allowed

死记硬背题