名词
中文翻译：外胚层
同义词：
['outer layer', 'chorion例句：1. The acrosome is the outer layer of the egg that contains the fertilization membranes.（卵黄膜是鸡蛋的外层，包含受精膜。）']
例句：
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1. The acrosome is the outer layer of the egg that contains the fertilization membranes.
卵黄膜是鸡蛋的外层，包含受精膜。
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2. During embryonic development, the acrosome undergoes significant changes in response to environmental stimuli.
在胚胎发育过程中，卵黄膜会因环境刺激而发生显著变化。
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3.A study on the acrosome has revealed its role in regulating gene expression during early development.
关于卵黄膜的研究揭示了其在早期发育中调节基因表达的作用。