名词
中文翻译：精子的颈部
同义词：
['sperm neck', 'spermatic cord', 'spermatic cord']
例句：
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1. The sperm whaleis the largest living mammal.
鲸鲨是现存最大的哺乳动物。
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2.The sperm whale's unique behavior has been studied for decades.
鲸鲨独特的行为已经研究了几十年。
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3. Sperm whales are known for their large size and powerful tails.
鲸鲨以其庞大的体型和有力的尾巴而闻名。