前提

The distribution and fractionation of Rare Earth Element are the base for their usage as trace elements.

稀土元素在环境中的分布分异机制，是研究其作为地球化学示踪剂的重要基础和必要前提。

You must study to be frank with the world:frankness is the child of honesty and courage.

你必须学会坦诚的对待这个世界，坦白是正直和勇气的前提。

The power of openness and frankness is enough to lift up one to the top.

即使你取得一些小的成功，也是暂时的，因为最大的成功是在安全前提下的成功。

The trajectory of the COM of the robot in stance phase is determined by solving the dynamic equation of the virtual leg, which can make the robot fly in the air. In flight phase, the COM of the robot moves as a free falling body.

四、在满足动力学条件和稳定性的前提下，提出了基于"虚拟腿"的仿人跑步机器人跑步步态规划方法，并通过仿真成功地实现了速度为2.9m／s的跑步动作。

At last,this article stresses that the free mobility of talented personnel is the essential prerequisite of the development of resources of human talents.

同时还强调了人才的自由流动为人才资源开发的必要前提问题。

How consider and design very bilateral collaboration content, it is a free-trade area the premise of good progress.

如何考虑和设计好双方的合作内容，是自由贸易区良好发展的前提。

His research competes with that of Dr. Freund but is predicated on the same concept: that it could be possible to warn that quakes are coming.

他跟弗洛伊德的理论方向不同，但他们有一个共同前提，那就是地震前发布预警是可能的。

The paper analyses two kinds of new formulas on the equivalent friction coefficient of V-belt drive in the present mechanical design and finds out that one is reasonable but has certain error and the other is wrong.

对现行机械设计中关于V带传动当量摩擦系数的2种计算公式进行分析。认为其中一种公式是合理的，但存在一定的误差；而另一种公式却是错误的。通过推导V带欧拉公式，给出了计算V带传动当量摩擦系数的准确公式，并在公式中引入了一个新的参数——摩擦力方向角。在考虑皮带拉力变化既有径向滑动又有周向滑动的前提下，改进后的计算公式比现有公式更加完善

The rats agree to help Mrs. Frisby, but only if somebody will drug the farmer's mean cat. When Mrs.

老鼠们答应帮助弗里斯比太太，但前提是必须有人把农夫那只讨厌的猫给毒死。

But only if you also buy Findus Frozen Fish Fingers.

但前提是你要买芬达猫牌的冻鱼条

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。