Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
I'm retired.
我退休了。
He that doth lend, doth lose his friend.
失友都因借钱起。
But every night he heard the noise upstairs.
但每天晚上他都听到楼上的声音。