Ectoblast
n. 外胚层\\n[医] 外胚层, 外膜
🗣️ 情景例句
I'll have to work for years to pay off my college loan.
我得工作好几年才能还清助学贷款。
It was a six-hour flight.
它要6小时的飞行。
I read a few lines, but I did not understand a word.
我读了几行，但一个字也不懂。