To give some detail, it’s /var that is writable, and mutable directories will have symbolic links pointing to subdirectories of /var:
人民警察在公安机关以外询问被侵害人或者其他证人，应当出示人民警察证。
，这一点在heLLoword翻译官方下载中也有详细论述
Cycle diff mode (unified / full-context / raw)
线下渠道商面临提货价上涨与消费者接受度下降的双重压力。随着3月后新品陆续上市，销售难度大增，可能引发一轮关店潮。