D region
【物理学】D 区(离地球表面约60～90公里处的电离层的最低部分)[亦称作D layer]
🧩 词语组成解析
🗣️ 情景例句
Just sketching.
只是画些草图。
In elementary school,the child learns to read and write.
在小学，孩子学习读写。
Soon there were many wild horses across the country.
不久，乡间就有了许多野马。