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词汇 Golfball
分类 英语词汇 英语翻译词典
释义

Golfball

原声例句
哈利波特与火焰杯

Harry couldn't answer them, he just nodded, feeling as though there were a golfball stuck in his throat.

哈利无法回答他们，只好点点头，觉得嗓子眼里仿佛塞了一个高尔夫球。

SciSHow 快问快答小科普

Thanks for asking, and for more about the science of sports, check out our video about why golfballs have dimples.

感谢您的提问，有关运动科学的更多信息，请观看我们关于为什么高尔夫球有酒窝的视频。

英语百科

Golf ball

（重定向自Golfball）
A golf ball beside a hole
Featherie golf balls
Drag coefficient Cd for a sphere as a function of Reynolds number Re, as obtained from laboratory experiments. The solid line is for a sphere with a smooth surface, while the dashed line is for the case of a rough surface (e.g. with small dimples). There is a range of fluid velocities where a rough-surfaced golf ball experiences less drag than a smooth ball. The numbers along the line indicate several flow regimes and associated changes in the drag coefficient: •2: attached flow (Stokes flow) and steady separated flow, •3: separated unsteady flow, having a laminar flow boundary layer upstream of the separation, and producing a vortex street, •4: separated unsteady flow with a laminar boundary layer at the upstream side, before flow separation, with downstream of the sphere a chaotic turbulent wake, •5: post-critical separated flow, with a turbulent boundary layer.

A golf ball is a special ball designed to be used in the game of golf.

Under the rules of golf, a golf ball has a mass no more than 1.620 oz (45.93 grams), has a diameter not less than 1.680 in (42.67 mm), and performs within specified velocity, distance, and symmetry limits. Like golf clubs, golf balls are subject to testing and approval by the R&A (formerly part of the Royal and Ancient Golf Club of St Andrews) and the United States Golf Association, and those that do not conform with regulations may not be used in competitions (Rule 5–1).
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