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On the basis of analyzing detailedly the correlative conclusions of the extreme value problem of two variable Function , this paper extends the essential condition and sufficient condition to multi-variable function by using the Taylor Formula 、Quadratic Form 、Hesse Matrix and so on,and gives a method to judge the extreme value of point whose vice-derivative doesn't exist by utilizing Lagranges theorem ,so that compensates for the blank above ,which turns idea that solve the extreme value of multi-variable function problem one by one into realities.

摘要本文在对二元函数极值问题的相关结论进行分析的基础上，用泰勒公式、二次型、海赛矩阵作为工具，将二元函数极值的必要条件和充分条件推广到多元函数的情形，而且还利用拉格朗日中值定理找到了一个判别不可导点处极值的方法，从而弥补了多元函数不可导点处极值无法判断的空缺。因而，使得用穷举判断的方法来解决多元函数的极值问题这一思路成为现实。

Even now, when closing my eyes, I could still see something like eyewinkers which did exist but beyond my eyeshot forever.

即使现在，闭上眼睛，我仍能看到眼帘上乱七八糟的麻点，它确实存在，但永远在你的视野之外。

Should keep the skin of the face and hands clean, because the surface of the computer screen exist a lot of static electricity, aggregated dust can switch to all parts of the exposed skin of the face and hands of the operator , if it is not be cleaned, over time, susceptible to ugly rash, pigmentation, severe cases may even cause skin lesions, affecting beauty and health.

应经常保持脸部和手的皮肤清洁，因为电脑荧光屏表面存在着大量静电，其聚集的灰尘可转射到操作者脸部和手的皮肤裸露处，如不注意清洁，时间久了，易发生难看的斑疹、色素沉着，严重者甚至会引起皮肤病变，影响美容与身心健康

Given that the vast majority of criminal statutes facially apply to conduct, it is unlikely that such cases would exist for most statutes on the books.

假定大量刑事法令的大部分表面上都适用于行为，其不太可能——大部分法令的案例只存在于书上。

Legislation and research of international factoring in our country is still at entry-level, so different ideas exist.

由于我国在国际保理的立法与研究上还处于初级状态，因此目前学界存在一些不同的认识和观点。

The fanancial aids, ideal of running university, system building, social psychology, the faculty building can not keep up with the rapid development of mass higher education. There exist some blindness including size and speed, the university upgrading, renaming and program arrangements.

即在经费投入，办学理念、制度建设和社会心理，教师队伍建设方面跟不上高等教育大众化的快速进程，在高校发展规模与速度，学校升格、改名和专业设置，高校贷款搞建设方面存在着盲目性。

Uses an ecological perspective to study the theory and faculty resources to expand higher education research perspective, broadening the field of higher education research, contribute to improved human resource management college teachers to improve the ecological environment of faculty resources to address university Teacher Resource and ecological imbalances that exist in the system and to promote the ecological health of faculty resources development, further enhance the university teaching and research, has important theoretical and practical significance.

用生态学的理论和视角来研究高校教师人力资源扩大了高等教育的研究视角，拓宽了高等教育研究的领域，有助于改良高校教师人力资源管理模式，改善高校教师人力资源生态环境，处理高校教师人力资源系统中存在的生态失调难题，促进高校教师人力资源生态健康发展，从而进一步提高高校的教学和科研水平，具有重要的理论和实践意义。

The web is not a fad, and it is not a world that doesn't exist.

网站不是风靡一时的东西，它不是虚幻的，是真实存在的世界，我们应该这样看待网络。

You may argue that God doesn't exist, but you are just following a fad.

你可以声称上帝不存在，但你只是盲从潮流。

How can you tell the leaves not to fall when wind exist?

你能告诉我如何在有乌云的时候不下雨呢？

My father is over 60 years old, and he lifts weights every day.

我爸爸六十多岁了，他每天都练习举重。

Then in a serious tone she declared:"It doesn't pay, dear boy, to look like a ninny with one's wife the first night."

两眼湿润了，她把身子蜷得很小，这样似乎可以更好地闻闻自己。