Many different designs emerged over the course of six years.
在六年的进程中出现了许多不同的方案。
The X3 and the X2 use very different designs to get around these limitations.
X3和X2采用截然不同的设计来绕开这些限制。
Different models of cars, produced by assembling different parts and following different designs.
通过遵循不同的设计,组装不同的部件,生产不同型号的汽车。
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