地球总是在转动的，孩子也一样！学会有关于卡车，汽车，火车，飞机和轮船及他们的用途。
The world is always in motion and so are kids! Learn about trucks, cars, trains, planes, and boats and what they do.
地球总是在转动的，孩子也一样！学会有关于卡车，汽车，火车，飞机和轮船及他们的用途。
The world is always in motion and so are kids! Learn about trucks, cars, trains, planes, and boats and what they do.
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