Fluoranthene
荧蒽
🗣️ 情景例句
It is already.
现在已经很兴奋了
They are so busy these days, that they don't even have time for their friends.
他们最近忙得没法和朋友见面。
Now move the hand to and fro and around but not up and down.
然后把手前后左右以及旋转摆动，但不要上下摆动。