按钮，您可以点击向前或向后通过您的介绍。
Buttons that you can click to move forward or backward through your presentation.
通过传递正或负的增量就可以在堆栈中向前或向后移动。
By passing positive and negative increments, we will move forward and backward in the stack.
他们仅靠胡乱向后倾或向前倾来保持不稳定的平衡。
They maintain a precarious balance only by careening wildly back and forth.
每个字组藏被写的数目的名字向前的或向后的。
Each word hides the name of a number written either forward or backward.
座椅构件可以面向前方或面向后方架设在底部构件上。
The seat member can be provided on the bottom member in front or rear direction.
座椅构件可以面向前方或面向后方架设在底部构件上。
The seat member can be provided on the bottom member in front or rear direction.
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