人为母群; 引进母群, 人为母群；引进母群

artificial stocking的用法和样例：

例句

Producers use artificial insemination to fertilize the eggs.生产者往往用人工授精来使更多蛋受精。
Thomas Beatie, a transgender man of Oregon, gets pregnant by artificial insemination.美俄勒冈州变形男子托马斯贝蒂通过人工授精方式怀孕。

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Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到听力原文收集区，您将会获得10 到 30积分的奖励! Thank you！

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