Phugoid
长週期振动
🗣️ 情景例句
I have received the secretarial training for six months.
我曾接受过6个月的秘书训练。
How did you sign the letter?Did you write, sincerely yours?
你怎么签名信的?你写了"真诚地你的"？
That's Su Weifang.
那是苏魏芳。