Ectochorion
外绒(毛)膜
🗣️ 情景例句
She'll be fine.
她不会有事。
Do you have any idea?
你怎么想？
These friendly dogs, which were first brought from Asia, were used as watchdogs even in Roman times.
那些最先从亚洲引进的狗，待人友好，早在罗马时代就给人当看门狗了。