必要条件

It provides a significant condition for data management of digital human body, multi-data introject and imitation and virtual technique.

数字人体的数据管理、多种数据融与仿真虚拟技术提供了必要条件。

The metallogenic material was from deep alkalic basaltic magma, and the pulsatory invasion was the necessary metallogenic condition of the ore deposit.

成矿物质源于碱性玄武岩浆，基性次火山岩浆多次脉动式入侵是矿床形成的必要条件。

By using Taylor's formula, the article deduces the sufficient condition of the existent extreme value and the necessary condition of the inexistent extreme value of trinary function.

通过利用泰勒公式推导出断三元函数极值存在的充分条件和极值不存在的必要条件。

Thus, the boron-bearing rock system and the magnesian rocks are the foundation of the borate deposits, whereas regional metamorphism and migmatitization and tectonism are the necessary conditions.

含硼岩系、镁质容矿岩石是硼矿形成的物质基础，区域变质及混岩作用、构造活动是硼矿形成的必要条件。

Dimethyl phenylethyl carbinyl acetate (DPCA ) was synthesized by using a new catalyst. This technology decreases the pollution and can also be used in synthesis of other carbinyl acetates perfume.

用一种新型催成乙酸二甲基苯乙基原酯(DPCA),并简了成工艺,减少了生产过程中产生的三废,因而投入生产已具备了必要条件。这种新型催可用于其它原酯类香料的成。