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1·The influence of the size of sound lens and the sound velocity in sound lens material and crude oil and rock stratum on the sphere of action is studied.

分析了声透镜尺寸及材料中的声速、原油及岩层中的声速对其传播距离的影响。

2·Compared the literature of Hunan in the Tang Dynasty with before, the quantity of native writers and from other parts increase and the sphere of action is expanded.

唐代的湖南文学与以前比较，本土作家和流寓的外籍作家增多，作家的活动范围和文学所反映的社会生活层面得到扩展。

3·A new formula on the action sphere of reel slat is driven out through the graphical analysis of reel slat motion locus in this paper.

本文利用图解法分析了拨禾轮的运动轨迹，并推导出新的拨禾轮作用范围的公式。

4·The perturbation method is used to analyse the motion of the rigid sphere under the action of the nonlinear sliding friction.

用摄动法分析刚球在非线性滑动摩擦力作用下的运动规律。

5·The sphere of its action was to be this present life.

而他们的活动范围也在现世。

6·Their function was not to be passive, but active. The sphere of its action was to be this present life.

他们的作用不是消极的，而是积极的，它的作用存在与现实生活中。

7·Ball is a sphere with a circular channel for gate parts, ball rotation with the stem of the valve action to achieve headstock.

球阀原理，球阀是用带有圆形通道的球体作启闭件，球体随阀杆转动实现启闭动作的阀门。