分析其可能的原因是传导痛觉的脊髓丘脑侧束在上行过程中有不交叉纤维。
The cause may be that there were uncrossing nerve fibers in the lateral spinothalamic tract.
闪电到达地面前，某物质沿此离子束上行。
Before the lightning comes down, something goes up through this tunnel that is formed by the ions.
闪电到达地面前，某物质沿此离子束上行。
Before the lightning comes down, something goes up through this tunnel that is formed by the ions.
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