D-usninic acid
[化] 右旋地衣酸
🧩 词语组成解析
🗣️ 情景例句
I guess they're trying to set up an appointment for me.
我猜他们正设法给我安排晤谈。
The accident held the train up for an hour.
那事故使火车延误了一个小时。
Frank gently lifted the crockery out of the box an suddenly noticed a miniature painting at the bottom of the packing case.
弗兰克轻轻地把陶器拿出箱子，突然发现在箱底有一幅微型画，