Ethanedioic acid
n. 乙二酸; 草酸
🧩 词语组成解析
🗣️ 情景例句
What does John do?
John现在做什么事？
Hardships never come alone.
祸不单行。
'He had travelled only seven miles across the Channel when his engine failed and he was forced to land on sea.
但他只在海峡上空飞行7英里，引擎就发生了故障，他只好降落在海面上。