所述的固定板是一连接在支架上的缓冲板、一连接在支架上的附加板或驱动装置侧面之一。
Said retaining plate is one dead block connected on bracket, one add-on plate connected on bracket or side face of drive unit.
大部分的Arduino控制板已经有一个附加到13脚的LED了.也就是说,如果你没有额外的LED硬件,你也可以看到控制板上自带的LED灯闪.
Most Arduino boards already have an LED attached to pin 13 on the board itself. If you run this example with no hardware attached, you should see that LED blink.
有的用户可能喜欢简单的界面，而有些用户更喜欢能提供附加信息的仪表板样式的界面。
Some users might prefer simple interfaces, whereas other users might prefer dashboard-style interfaces with additional information.
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