Ectosexine
外表层
🗣️ 情景例句
We should have done it sooner.
我们早就该取下来的。
His necktie is behind the book case.
他的领带在书架后面。
Our foreign trade policy has always been based on equality and mutual benefit and exchange of needed goods.
我们的对外贸易政策一向是以平等互利、互通有无为基础的。