It's the basic physics that the air is thinner and the resistance to any projectile is less so the flight path of the ball will be different at high altitude.
基本物理学理论上，空气越稀薄情况下，任何物体的耐性都会减少，因此球路也会因海拔高度不同而有所变化。
Suppose this is the flight path of the ball. I retreat to a position far behind the table. The ball has just fallen. I start with the paddle well above and behind the ball.
假设这是球的飞行路线，我退到离球台很远的地方， 球正好落下来，我向球的后上方引拍。
The swerving of a ball from a straight path of flight, as in baseball or cricket.
棒球胜于板球的一大优点在于完的快。
The swerving of a ball from a straight path of flight, as in baseball or cricket.
棒球胜于板球的一大优点在于完的快。
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