Ballroom dancing has long been considered a form of healthy exercise in China, with large groups gathering in parks or sports grounds to whirl away to piped-in music.
集体舞在中国被认为是一项健康运动，在公园和体育场都可以看到大量的人们随着音乐起舞。
To free electrons, something has to make them whirl fast enough to break away from their nuclei.
为了释放电子，必须使电子高速旋转而足以摆脱它们的原子核。
To free electrons, something has to make them whirl fast enough to break away from their nuclei.
为了释放电子，必须使电子高速旋转而足以摆脱它们的原子核。
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