Semioscillation
半(周期)振荡
🗣️ 情景例句
I'm busy packing for the journey.
我为外出旅行，正忙着打点行李。
She is free any time you need help.
你需要帮忙时，请随时向她求助好了。
In Maori history,the first traveller to reach New Zealand in the year 950 was a man called Kupe.
毛利人的历史上，于950年第一个到达新西兰的旅行者是一个名叫库佩的人。