This mirror complex and its support structure were expected to form the largest single fragment in what could have been a shower of some 30 pieces of debris to make it through to the surface.
这面镜子比较复杂，而且预计其支撑结构形成了最大的单一碎片，它在原本可能有30块的碎片雨中成功地追回地面。
The mirror base and the support have single-point connection structures or multi-point connection structures to adjust the direction of the mirror surface.
镜座与支架为单点连接结构或多点连接结构，以调节镜面的方向。
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