Agathic acid
[化] 贝壳杉酸; 玛瑙酸
🧩 词语组成解析
🗣️ 情景例句
Never chew with your mouth open.
嚼东西时别张着嘴。
When did you find this book?
你什么时候找到这本书的？
because this is easier to shape than other kinds.
因为燧石较之其他石头更容易成形。