Mesectoderm
中外胚层
🗣️ 情景例句
May I ask for a morning call tomorrow morning?
明天早上请叫我起床好吗？
Why are you frustrated?
你为什么失败？
'I needn't remind you of that terrible tie you bought yesterday.'
“我也不必提醒你昨天买的那条糟糕透了的领带。”