?档位数
档位数(Number of gears)：- 1
The bit serial adder system was chosen over a normal gear system because of the number of gears it takes to make the clock's calculations. 该位串行加法器系统是选择了一个由于齿轮数齿轮系统的正常需要，使时钟的计算。 - 2
Note that PersistJS supports a number of different backends, including Gears. 值得注意的是，PersistJS可以支持包括Gears在内的大量后端技术。 - 3
The gear spins on the wheel hub, drives the other gears, which, according to the number of the teeth, spin faster or slower than the original one. 齿轮在轮毂或轴上旋转，带动其它一些齿轮，后者则可以比前者转得快或慢，这取决于基本齿轮的齿数。
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