密歇根高尔夫协会的主管大卫·格雷厄姆认为“这其实是在对市场进行调整”，他说密歇根州掀起了长达10 - 15年开发球场的热潮。

"It's an issue of a market adjustment," says David Graham, executive director of the Golf Association of Michigan, who says his state led the country in the past 10-15 years in course openings.

youdao

密歇根高尔夫协会的主管大卫•格雷厄姆认为“这其实是在对市场进行调整”，他说密歇根州掀起了长达10-15年开发球场的热潮。

“It's an issue of a market adjustment,” says David Graham, executive director of the Golf Association of Michigan, who says his state led the country in the past 10-15 years in course openings.

youdao

这就需要用产生一个力- - -称为马格努斯效应- - -的侧旋，以引发球轨道的弯曲。

This is done by applying side spin, which generates a force - called the Magnus force - that causes the ball's trajectory to bend.

youdao