这可避免不必要的动作，而你是左右印刷。
This can avoid unnecessary movements while you are going about printing.
设备运行中请勿随意移动或做不必要的动作。
Please do not move or do any unnecessary actions at the running of the ride.
王子没有力气作任何不必要的动作，所以根本不需要照看。
Prince required but slight attention, lacking energy for superfluous movements of any sort.
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