名词
中文翻译：外胚层
同义词：
['outer epidermis', 'outer layer', 'outermost layer']
例句：
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1. The ectolabium of the butterfly is responsible for its ability to fly.
蝴蝶的外胚层负责其飞行的能力。
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2. The study of ectolabium has led to new insights into the development of the nervous system.
对外胚层的研究表明，有助于神经发育的新见解。
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3. The ectolabium of the flower contains nectar, which attracts pollinators.
花朵的外胚层含有花蜜，吸引传粉者。