“placental retention”的概念、定义、翻译、参考文献-科学参考

单词	placental retention
释义	placental retention Encyclopedia 农学繁殖障碍释 placental retention胎盘滞留母畜娩出胎儿后，胎盘在第三产程的生理时限内未能排出的现象。又称胎衣不下。
随便看	trivializing trivial knot trivial line bundle trivial link trivial loop trivial mapping trivial metric trivial module trivial nest trivial norm trivial operation trivial operator trivial ordered trivial ordered set trivial product trivial relation trivial representation trivial restriction trivial ring trivial section trivial set trivial shape trivial sheaf trivial solution trivial space

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