Squaric acid
[化] 方形酸; 二羟基环丁烯二酮
🧩 词语组成解析
🗣️ 情景例句
Thank you.
谢谢你。
Mary, this is Joe's brother David.
玛丽，这是乔的兄弟戴维。
No! But the children are not alone. There are some animals on the island.
没有！但岛上并非只有孩子们。岛上还有一些动物。