Beckmann molecular transformation
[机] 贝克曼分子转换
🧩 词语组成解析
[机] 贝克曼
🗣️ 情景例句
As a matter of fact,
事实上，
Every dog is valiant at his own door.
站在家门口，狗也雄纠纠。
Yes, please.
好，请拿一本。