词汇	user segment
释义	user segment 用户段
随便看	projection geometry projection geometry code projection glass projection gradient method projection grads projection grating Projection grating profilometry projection grid Projection Gridiron Control Board projection grinder projection head projection histogram projection holography projection homomorphisim projection homomorphism projection illumination projection image projection image area projection image plane projection imaging projection index projection inheritance Projection-initialization projection instrument projection interferometer