When a spring, beside the stand, is flipped, It knocks the card out from under the ball.

当在底座旁的弹簧弹开并将卡片由球下敲出。

youdao

When a spring, beside the stand, is flipped, It knocks the card out from under the ball.

当在底座旁的弹簧弹开并将卡片由球下敲出。

youdao