Ectomesoderm
外中胚层
🗣️ 情景例句
You hit the nail right on the head.
你说对了。
When flatterers meet, the devil goes to dinner.
马屁精会面，魔鬼去赴宴。
She always referred to them as 'the shifting population', for they came and went with such frequency that I never even got a chance to learn their names.
她称这些佣人叫“流动人口”，因为他们来匆匆，所以我甚至都没有机会知道他们的姓名。