求翻译：就业指导在具体操作中以什么作为指导理念，这也是一个十分关键的问题。我国的职业指导工作，起步并不晚，但由于经济和社会发展的局限，目前尚未形成较完整的理论体系。西方职业指导始于19世纪末、20世纪初，至今已有近百年的历史。在丰富的实践基础上，逐步形成了一系列的理论模式。本文在这里首先将对西方职业指导理论的变迁做一个简单的梳理，试图从中把握世界职业指导理论的发展趋势和走向。这种趋势和走向可以为我国的职业指导工作提供比较有价值的参考，中职就业指导作为职业指导体系中的一个重要组成部分，也可以从中受到一定的启发。是什么意思？

Employment guidance in specific action to what as a guiding concept, this is a very critical issue. Our career guidance, not late start, but due to the limitations of the economic and social development, is not yet formed a complete theoretical system. Vocational guidance in the West began in the late 19th century and early 20th century, it has been nearly a century of history. Based on abundant practice, and gradually form a series of theoretical models. First of all, this article here will change on Western vocational guidance theory to make a simple comb, trying to grasp the development trend of world vocational guidance theory and trends. Can this trend and to provide our professional guides provide more value to the work of reference for vocational employment guidance as an important component of career guidance system, which also can be inspired.