即使登陆了NBA，诺维茨基每年夏天都会飞回家乡和霍尔格一同训练。
Even after entering NBA, every summer, Nowitzki would fly back to hometown to train himself with Holger.
供职于德国哥根廷马克思普朗克协会进行太阳系研究的霍尔格思科表示，这颗彗星的内部密度仅为水的一半。
The comet's interior, meanwhile, says Holger Sierks of the Max Planck Institute for Solar System Research, in Göttingen, Germany, has only half the density of water.
霍尔格让他完成90分钟的手着地行走和击剑训练，他也得穿着22磅重的运动背心练习持球转身，跳跃和投篮。
The training includes 90-minute hand-walking and fencing. Besides, he has to pivots, leaps, and shoots with a 22-pound vest.
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