Ulmic acid
[化] 赤榆酸\\n[医] 榆酸
🧩 词语组成解析
棕腐质的
🗣️ 情景例句
Well, have you ever thought of becoming a journalist?
好， 你是否想过成为一名新闻从业人员？
She began playing the violin when she was nine.
九岁的时候，她开始拉小提琴。
After a great many loud explosions, the race began.
在好一阵喧闹的爆炸声之后，比赛开始了。