You can help your child track his or her distances in a simple notebook or on the computer. Just write down the date and the estimate of the distance.
你可以帮助你的孩子在一个简单的本子或者电脑上记录每次跑步的距离，仅仅日期和每次的估计里程就足够。
In fact, ever since the discovery of this phenomenon, whenever astronomers cannot measure a galaxy's distance more directly they instead give an estimate using its redshift as a proxy.
事实上，从那以后，当天文学家无法找到更直接的测量星系距离的方法时，他们会以红移来代替。
By moving your body, your brain has to learn new muscle skills, estimate distance and practice balance. Choose a variety of exercises to challenge your brain.
体育运动同时大脑也得到了锻炼。通过肢体运动，大脑也学会了控制肌肉的新技巧，增强了判断距离的能力和保持肢体平衡的技巧。应选择多种运动方式来锻炼大脑。
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