D-usninic acid
[化] 右旋地衣酸
🧩 词语组成解析
🗣️ 情景例句
Rules are meant to be followed, not broken.
规则制订出来是让人遵守，而不是让人破坏。
A bird is known by its note,and a man by his talk.
鸟以声闻，人以言知。
My name is Wu Jun. This is our first lesson, so I don't know all your names.
我叫吴军。这是我们第一次上课，所以我认不全你们的名字。