Forgenin
甲酸四甲铵
🗣️ 情景例句
I don't know how to thank you, Susan.
我不知道如何谢你， Susan。
Here, let me carry half of those for you.
喏，让我替你拿一半吧。
But some time later it began to rain.
但过了一阵子。天下起雨来，