D-usninic acid
[化] 右旋地衣酸
🧩 词语组成解析
🗣️ 情景例句
Great job!
干得好，干得妙！
With my heart in my boots, I went into the dark room.
我战战兢兢地走进那黑洞洞的房间。
At that time, gold was discovered in California and thousands of people rushed there to look for gold.
当时有人在加利福利亚发现了黄金，于是成千上万的人涌到那里去寻找金子