Try this simple experiment: Make a throwing motion with your arm.

试试这个简单的实验：用你的手臂投掷。

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Sometimes, it may seem too similar, so just vary the timing of the motion or change the motion of an arm or head and it will cease to resemble the original.

有时，也许看起来太相似了，只需修改运动的时间或者改变手臂或头的运动将不会再象原来的了。

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The technique of staccato involves an active and coordinated arm wrist hand and finger motion in which all the components participate simultaneously.

断奏的方法需要有活性协调的手臂、腕关节、手臂和手指运动，在这个奏法中所有器官都要同时参与。

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Jaeger's basic philosophy was this: Extending the elbow and shoulder muscles in a relaxed, fluid motion prepares an arm to throw as hard as it can.

WSJ: Dylan Bundy, Trevor Bauer, Matt Barnes: Throwing Long to Throw Short

As a flatpicker, he used a traditional tear-shaped medium gauge nylon flatpick and was known for his speed, tone and precision -- with a little extra arm motion.

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With baseball pitchers it's a certain rhythmically whippy arm motion.

FORBES: People and Things to Like--2005