Warning: file_put_contents(/www/wwwroot/ppbbu/www.30232.com/cache/d89f28720c32e200a34f4408d434dc14.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/www.30232.com/index.php on line 55 stage of mental development是什么意思，stage of mental development的翻译，stage of mental development音标、读音、用法和例句_绍翊字体网有道词典
There is high rate of bullying problem among the elementary school students because it is the special stage of their physical and mental development. 小学儿童因其身心发展的特殊性，成为欺负行为的高发人群。