Perhalogenomethane
全卤甲烷
🗣️ 情景例句
Me?
我？
Many sands will sink a ship.
积沙沈船。
he said. But I don't have many friends, and I don't enjoy myself very much. I don't know why!
他说，“但是我没有很多朋友，我过得不很愉快。我不懂为什么！”