1·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.
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。
2·One of the beads was pinned to a glass surface so that as it spun the other rotated around it.
其中一个珠子用针固定在玻璃表面，它转动的时候另一颗珠子就会围绕着它旋转。
3·For example, many of the photos I take with my digital cameras are rotated ninety degrees, as they are taken as portraits.
例如，我用数码相机所拍摄的许多照片都旋转了九十度，因为我是把相机竖过来拍摄它们的。
4·These tiles are then rotated 180 degrees and saved with the filename of its appropriately translated position.
然后将这些块旋转180度角，并以适当的转换位置作为文件名保存它们。
5·With the tools and code presented above, you can create a rotated map within the existing interface.
通过以上提供的工具和代码，您可以在现有的界面中创建旋转地图。
1·The food supplies should be rotated every 6 months to keep them fresh.
食品供应应当每6个月就循环一次，以保证其新鲜。