- 铅直: vertical; plumb
- 的: 4次方是 The fourth power of 2 i ...
- 非铅直的: out of plumb
- 铅直: vertical; plumb◇铅直板 lamina perpendicularis; 铅直地层离距 vertical stratigraphic separation; 铅直风速表 anemoclinometer; vertical anemometer
- 直的: direct; rectilinear; rectus; sagittal; straight; unswerving; upright
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