The RTLS provider might provide location data on a coordination system in the form of x, y, z, id, or for two-dimensional data in the form of x, y, id.

RTLS提供者可以通过一个形式为x, y, z, id的坐标系统来提供位置数据，或者对二维数据采用形式为x, y, id的坐标系统。

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Initially, its location as a function of time is equal to i times x plus j times y.

初始时刻,它的位移作为时间的函数等于,i ? x + j ? y

耶鲁公开课 - 基础物理课程节选

At every instant, it's got a location given by the vector R; R itself is contained in a pair of numbers, x and y, and they vary with time.

在每一个瞬时,它的位置由位矢 R 给出,R 本身包含了一对坐标值 x 和 y,并且它们都随着时间的变化而变化

耶鲁公开课 - 基础物理课程节选

In other words, the x, y location of the touch, the force or depth of the touch, and the vector direction of the touch (2 angles).

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