Collagens
(collagen 的复数) n. 胶原\\n[化] 骨胶原; 胶原
🗣️ 情景例句
How did you feel?
感觉怎么样？
He ran like hell.
他拼命跑。
because this is easier to shape than other kinds.
因为燧石较之其他石头更容易成形。