轮子旋转时需要承受巨大的和不断变化的压力，所以要使结构更坚固，钢的部分要用螺栓连接，而不是焊接在一起。
The wheel would need to withstand immense and constantly changing stresses as it rotated, so to make the structure more robust, the steel sections were bolted rather than welded together.
例如，高增长率给现有的治理结构、行政结构，尤其是社会化结构带来了巨大的压力。
For example, a high growth rate placed great strains on the existing structures of governance, of administration, and above all of socialization.
在受到压力时，拱形结构能够起到将其上面的压力转移到侧面，在侧面的重量则由拱形结构两侧的垂直部分来承受。
It works in compression to divert the weight above it out to the sides, where the weight is borne by the vertical elements on either side of the arch.
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