中肾管退化，中肾旁管上段和中段未融合部分发育为输卵管。
The mesonephric duct degenerates, whereas the unfused upper and middle part of the paramesonephric duct develops into the oviduct.
激光二级管的退化是一个特别麻烦的问题。
The problem of laser diode degradation was particularly troublesome.
对每个试件，裂纹出现在弦管连接表面，沿弦管与节点板的连接焊缝扩展，并导致性能退化及破坏。
For each specimen, cracks appeared on the chord connecting face, and extended along the weld connecting the plate and chord, which led to the performance degradation and failure of the connection.
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