Heptynoic acid
[化] 庚炔酸
🧩 词语组成解析
🗣️ 情景例句
What university did you graduate from?
你从哪所大学毕业的？
Day and night.
没日没夜。
'This is the prettiest carpet I have ever seen,' she said.
“这是我见过的最漂亮的地毯，”她说。