Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
I love to pig out on junk food.
我爱吃垃圾食品。
The market is declining, we recommend your immediate acceptance.
市场在萎缩，我们建议你方马上接受。
becomes so worn and unreliable that it eventually is not worth mending.
磨损太厉害，老得一点儿也不准了，最终会不值得修理了。