Ectosexine
外表层
🗣️ 情景例句
They are expecting their first child.
他们在怀他们的第一个小孩。
I was 10 minutes late.
我迟到了五分钟。
When you type a letter, the writing appears on a screen in front of you and is recorded onto a computer disk.
当你打一封信时，字迹出现在你前面的屏幕上并顾在电脑的磁盘里。