F region
【气象学】F区,F(电离)层(＝F layer)
🧩 词语组成解析
🗣️ 情景例句
Otherwise, they'll not be considered.
否则不予受理。
A fall into the pit, a gain in your wit.
吃一堑，长一智。
The same old favorites recur year in year out with monotonous regularity.
相同的决心以单调的规律年复一年地出现。