这个as什么词性?求翻译下as with 这句话 谢谢 在线等

as是连词,引导非限制性定语从句,它代指逗号后面the battle is to both adapt to and control all of the new possibilities for self-presentation所表示的情况,并在该定语从句中充当主语.
当然该从句存在着省略,即：
as with sb/sth = as is often the case with sb/sth 正如某人/某物（所存在的）通常的情况一样
具体句意翻译需要楼主进一步提供上下文才能准确给出.