v.进动；旋进；按岁差向前运行

The poles of the Earth precess at a right angle to the force that is applied. 地球的两极按照施加的力的大小以正确的角度不断地步进。

As two clocks precess in phase, problems may occur at only one phase relationship. 两个时钟产生相位，问题也许就出现在相位关系上。

HAP had relations with corma age inhospital time basic diseases and medical care precess. 感染与昏迷程度、年龄、住院时间、基础疾病及医疗操作有一定关系。

The results indicat that the reaction mechanism is a complicated precess and reaction products contain alkanolamide, alkanolamide ester. 研究结果表明,该反应是一个复杂的反应,既可生成酰胺单酯和双酯,又可生成醇胺单酯和双酯。

In each of our ensembles, the 10 billion or so excited electrons have a range of velocities and therefore precess in a variety of ways. 在我们每一个样品中，大约含有100亿个激发态电子，由于速度并不一致，进动方式也各有不同。