名词
中文翻译：卵
同义词：
['ovosphere', 'ovosome', 'ovum', 'egg', 'ova']
例句：
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1.The eggs are fertilized in the oviducts before being laid.
受精卵在输卵管中受精后才会被排出。
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2.The ovum is the female reproductive cell that contains a single nucleus.
卵细胞是含有单个核的雌性生殖细胞。
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3. The study of ovum development has important implications for understanding human reproduction.
研究卵细胞发育对于理解人类生殖具有重要意义。