Umbellonic acid
[化] 伞酮酸
🧩 词语组成解析
🗣️ 情景例句
Earth day should be every day.
每一天都应该是地球日。
If I went with you,I'd have to be back by six o'clock
如果我与你一起去了，我将不得不在6点钟回来。
I had forgotten all about the snails when Robert suddenly said that I must stay to dinner.
我把蜗牛的事已忘得一干二净，罗伯特突然提出一定要我留下来吃晚饭，这才提醒了我。