名词
中文翻译：囊胚层
同义词：
['blastocyst', 'cytotrophoblast', 'cytotrophoblastic', 'cytotrophoblastic layer例句：1. The pericystium is the outermost layer of the embryonic egg.（囊胚层是胚胎蛋的最外层。）']
例句：
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1. The pericystium is the outermost layer of the embryonic egg.
囊胚层是胚胎蛋的最外层。
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2.During the first trimester, the pericystium undergoes significant changes.
在怀孕的前三个月，囊胚层经历了显著的变化。
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3.The pericystium is responsible for providing nutrients to the developing embryo.
囊胚层负责为发育中的胚胎提供养分。