The goal is to have a single point ofcontrol for all updates to the same table regardless of the point of origin.
其目标是对同一个表的所有更新拥有单点控制，而不管更新的起源点。
2
We also control where the graph appears by setting the origin using screen coordinates (see help coordinates for a discussion on the different kinds of coordinate systems).
我们还通过使用屏幕坐标（请参阅 help coordinates ，获得关于不同类型坐标系统的讨论）设置原点来控制曲线图显示的位置。
3
Typically, witnesses who take the trouble to report a sighting consider the object to be of extraterrestrial origin or possibly a military craft but certainly under intelligent control.