what are results' keys' meaning

[JYS997760473]

I get the results of run test.py for an bbox, it likes this:
{'score': 0.5568161010742188, 'class': 1, 'ct': [1038.8736572265625, 510.8898010253906], 'bbox': [989.7716674804688, 479.7884216308594, 1078.92578125, 537.468017578125], 'dep': [41.123046875], 'dim': [1.5645606517791748, 1.9315428733825684, 4.52818489074707], 'alpha': -1.346496820449829, 'loc': [15.518500328063965, 4.738006591796875, 41.123046875], 'rot_y': -0.9856521099195575}
we know that it is a dict, but what are the full meaning of this keys? like 'loc'