The positioning method, avoid approaching the one-way transmission system from the reverse clearance positioning error.
采用单向趋近定位方法，避免传动系统反向间隙而产生的定位误差。
Keyboard arrow keys control direction, and avoid ice smooth clearance.
键盘上下键控制方向，躲避冰块顺利过关。
Avoid purchasing spare lithium-ion batteries for later use. Observe manufacturing dates. Do not buy old stock, even if sold at clearance prices.
避免购买多余的锂电池以备后用，检查制造日期。不要买库存货，即使很便宜。
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