Phosphazine
膦嗪
🗣️ 情景例句
Are you ready?
你准备好了吗
The morning sun never lasts a day.
好景不常。
Oil rigs have to be repaired frequently and divers,who often have to work in darkness a hundred feet under water,
钻井平台需要经常修理，潜水员常常要在水面100英尺以下摸黑工作，