According to the plane coordinate in each image, buccolingual direction was presented as X axis, mesial-distal direction as Y axis and occlusogingival direction as Z axis.
根据各层图上建立的平面坐标，设颊舌向为X轴，近远中向为Y轴，牙合龈向为Z轴。
Plane coordinates
英语例句库
原声例句
TED-Ed（视频版）
How should the three planes coordinate so the professor can fly continuously for the whole trip and achieve his dream without anyone running out of fuel and crashing?
三架飞机应该如何协调，才能让教授全程连续飞行， 实现他的梦想，而不至于有人没油坠毁？
英语百科
Two-dimensional space
In physics and mathematics, two-dimensional space or bi-dimensional space is a geometric model of the planar projection of the physical universe. The two dimensions are commonly called length and width. Both directions lie in the same plane.
A sequence of n real numbers can be understood as a location in n-dimensional space. When n = 2, the set of all such locations is called two-dimensional space or bi-dimensional space, and usually is thought of as a Euclidean space.
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