第三，保持健康。做一些户外运动，就像自行车和滑板。
Third, get fit. Do outdoor sports, such as biking and skateboarding.
在高空滑板运动中，你从飞机上跳出来，用滑板在空气中“冲浪”，在半空做体操！
In sky surfing you jump out of an aeroplane and use a board to 'surf' the air, doing gymnastics in mid-air!
变速箱式滑台工作原理是滑板在床身上做纵向运动，因其丝杠传动，再加上变速箱的作用。
Working principle of speed change box sliding table is the longitudinal motion on the bed. Because the lead screw drive, couple with the function of gear box.
变速箱式滑台工作原理是滑板在床身上做纵向运动，因其丝杠传动，再加上变速箱的作用。
Working principle of speed change box sliding table is the longitudinal motion on the bed. Because the lead screw drive, couple with the function of gear box.
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