A.
半径为振幅、逆时针旋转的模型;The model with radius of amplitude and counterclockwise rotation;
B.
直径为振幅、逆时针旋转的模型;The model whose diameter is the amplitude and rotates counterclockwise;
C.
直径为振幅、顺时针旋转的模型;The model whose diameter is the amplitude and rotates clockwise;
D.
半径为振幅、顺时针旋转的模型;The model with a radius of amplitude and a clockwise rotation;