求翻译：径向游隙非预紧状态，能承受径向载荷的轴承，其径向内部游隙G为：在不同角度方向，无外载荷作用时一个套圈相对另一套圈从一个径向偏心极限位置，移向相反极限位置的径向距离的算数平均值，轴向游隙非预紧状态，能在两个方向上承受轴向载荷的轴承，其轴向内部游隙G为：无外载荷作用时，一个套圈相对另一套圈，从一个轴向极限位置移向相反的极限位置的轴向距离的平均值。 2 轴承在不同状态下的游隙 轴承在不同状态下其游隙会发生相应的变化，具体说来，可分为： 1) 原始游隙 轴承的原始游隙是指轴承成套后在安装于机器前，所处在自由状态下的游隙。实际上原始游隙不通过测量是难以得知的．因此原始游隙常常用检验游隙来代替。检验游隙是在检验状态下，在施加测量载荷的条件下，用仪器检测而得的游隙数据，严 格地说与轴承的原始游隙并不相同，但在一般情况二者在读数上相差不大，因而可以相互代 替而不致发生多大误差。 2) 有效游隙 有效游隙或称工作游隙是指轴承在安装于主机后，在一定载荷作用下，达到一定温升的稳定运转状态下，轴承中存在的实际游隙。显然，有效游隙比工作游隙小。 3） 轴承游隙的作用与要求 轴承中存在游隙是为了保证轴承得以灵活无阻滞地运转，但是同时也要求能保证轴承运转平稳，轴承的轴线没有显著沉降，以及承担载荷的滚动体的数目尽可能多。因此，轴承的游隙对轴承的动态性能（噪声，振动和摩擦）和旋转精度，使用寿命（磨损与疲劳）的承载能力都有很大影响。是什么意思？

Radial tour gap non-pre-tight State, can bear radial load of bearing, its radial internal tour gap g for: in different angle direction, no outside load role Shi a a rings relative another a ring from a radial eccentric limit location, moved to instead limit location of radial distance of count average, axis to tour gap non-pre-tight State, can in two a direction Shang bear axis to load of bearing, its axis to internal tour gap g for: no outside load role Shi, a a rings relative another a ring, from a axis to limit location moved to instead of limit location of axis to distance of average. 2 bearings under different clearance of the bearing clearance occurs in a different state of corresponding changes, specifically, can be divided into: 1) the original clearance original clearance of the bearing is a bearing sets before the machine was installed, in the free State of clearance. Fact is difficult to know the original clearance without measurement. Therefore inspection clearance original clearance is often used instead. Under test is to verify the status of clearance, under the measuring load imposed conditions, instruments detected data of clearance, bearing the original clearance and strictly speaking is not the same, but in general the on reading little difference between the two, which can substitute each other without much error occurred. 2) effective clearance is effective clearance refers to the bearing clearance or work after the installation of host, under a certain load, reaches a certain temperature stability of running conditions, actual clearance in the bearing. Clearly, effective clearance is smaller than the operational clearance. 3) functions and requirements of the bearing clearance in bearing clearance exists to guarantee the bearings to be flexible and non-blocking operation, but can also require guarantees stable operation of bearings, bearing axis no significant settlement, and carry the load of the rolling number as much as possible. Therefore, the clearance of the bearing on dynamic properties of bearing (noise, vibration and friction) and rotation accuracy, service life (wear and fatigue) of carrying capacity has a great impact.