Spectrum signature
[电] 频谱特征
🧩 词语组成解析
🗣️ 情景例句
I'm leaving for Beijing on a four-day tour.
我马上要去北京旅游4天。
I meet the boy whose aunt is a housemaid.
我遇到那个男孩的姑妈是家庭主妇。
In fact, I was a bit frightened and didn't know what we should do.
事实上我有点害怕，不知道我们该怎么办。