Start as shown with the arms extended, back flat, legs fully extended and the balls of the feet on the Swiss ball.
开始动作如图所示：两臂伸直，背部保持平直，两腿充分蹬伸，脚掌置于健身球的球体之上。
I have this theory that, to us the world is a flat thing we stand on, but to birds it is a cliff they cling to, a huge ball and they cling to the side and then fall off and fly and glide.
我有一种想法，就是对我们来说世界是一个我们所站立的平坦的东西，而对鸟来说是一个它们所依靠的峭壁，一个巨大的球，它们依靠在边上，然后离开、飞翔、滑行。
Lean on the ball as shown, keep the back flat or maintain its natural curve, with the legs straight.
身体俯卧于球体之上，动作如图所示。背部保持正直或保持自然弯曲状态，腿部伸直。
Lie on a Swiss ball with your knees bent and feet flat on the floor.
人体卧于瑞士健身球上，两膝弯曲，足平放于地面。
Pressure on the ball bearing outer ring with a flat seat type, aligning seat type and seat type with a self-aligning washers.
压力球轴承外圈有平面座型、调心座型和带调心垫圈座型。
Adrian: No way. Every time I run up to kick it you pull the ball away and I fall flat on my face.
阿德·里恩：不行，每次当我助跑要去踢它时，你却把球拿走，而我就往前跌倒。
The footballer kicked at the ball but missed and fell flat on his face.
那个足球运动员要踢球，但没有踢到，闹了个嘴啃泥。
To get rid of the sharp Angle and the grinding tracks on the probe, the tip will be polished by roll-typed grinding wheels to become sharp, round, flat or ball pointed.
要把针头的利角及磨纹磨走，我们会利用滚筒型的砂轮把针头磨成尖、圆、平或子弹形形状。
To get rid of the sharp Angle and the grinding tracks on the probe, the tip will be polished by roll-typed grinding wheels to become sharp, round, flat or ball pointed.
要把针头的利角及磨纹磨走，我们会利用滚筒型的砂轮把针头磨成尖、圆、平或子弹形形状。
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