Usnaric acid
[化] 地衣那酸
🧩 词语组成解析
🗣️ 情景例句
I think she has a stomachache.
我想她肚子痛。
Is it serious?
我的病严重吗？
They sting or bite without provocation; they fly uninvited into our rooms on summer nights, or beat ageist our lighted windows.
它们无缘无故地又叮又咬；夏天的晚上，它们未经邀请便飞到我们房间里，或者对着露出亮光的窗户乱扑乱撞。