adj.先在的
He was recovered post-operatively, but with the preexistent sequele of paraplegia due to spinal cord injury from vascular surgery. 我们要注意腹部主动脉瘤病人接受紧急手术，术后有可能发生包括缺血性大肠炎或大肠坏死等的并发症，须进行紧急外科手术。
"These therapeutic effects were observed in the context of appropriate preexistent and continuing vigorous medical management of these patients."Medtronic Inc. 这些治疗效果可以在其他的研究中发现，并且持续地进行这些患者的治疗。
The facilitator will try to assist the group in achieving a consensus on any disagreements that preexist or emerge in the meeting so that it has a strong basis for future action. 因为 Tony Blair 可以说是一位四方会谈的 facilitator (这是 Tony Blair 的新工作)，al Qaeda 的组织里也有 facilitator， 前者版主倾向于译作 "推手";
The core idea of the method was to seek frequently-used sets of services combination sequences from the preexistent ones, then used the frequent sequences to recommend the services. 其核心思想是通过从以往服务组合序列中发现高频率出现的组合序列集，然后利用该序列集进行服务推荐。
The preexistent experiences from other large countries with a great diversity of aquatic ecosystem are beneficial to the nationwide forthcoming watershed restoration and management in China. 国际河流分类体系的研究成果对于我国多类型河流的生态恢复与管理具有重要的借鉴意义。
