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
In my country, we get a couple of days off for Easter.
在我国，我们在复活节的时候有好几天的假期。
Will you sign with our contract at this price?
你能以这个价钱在合约上签字吗？
Before it could be transported to the United States, a site had to be found for it and a pedestal had to be built.
在雕像被运往美国之前，必须为它选好一块场地，同时必须建造一个基座。