Dicarboxyl
联羧基, 乙二酸, 草酸
🗣️ 情景例句
When do we eat?
我们什么时候吃？
Every couple is not a pair.
同床异梦，貌合神离。
The morning passed rapidly and Frank was about to leave when he noticed a large packing case lying on the floor.
上午很快过去了，弗兰克正准备离去，突然看见地板上放着一只体积很大的货箱。