A shadow of the bat's impact zone is shown so you can line up your swing.
球棒的击球区会显示出阴影，让你可以对准了挥棒。
In mass production system, assembly line balance impact the efficiency of the whole manufacturing system.
在大批量生产制造系统中，装配线平衡问题关系到整个生产制造系统的效率。
In mass production system, assembly line balance impact the efficiency of the whole manufacturing system.
在大批量生产制造系统中，装配线平衡问题关系到整个生产制造系统的效率。
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