Phosphinyl
氧膦基
🗣️ 情景例句
How long?
多久？
All time is no time when it is past.
光阴一去不复返。
A tramp may ask you for money, but he will never ask you to feel sorry for him.
游浪汉可能会向你讨钱，但他从来不要你可怜他。