Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
Are you having a good time, Susan?
玩得高兴吗， Susan？
Wisdom is better than gold or silver.
智慧胜过金银。
'Good heavens!' exclaimed his wife.
“天啊！”他的夫人惊叫，