Trinitrocellulose
[医] 三硝基纤维素, 火棉
🗣️ 情景例句
Left, right. Enjoy it.
左 右。放 。
Is this within the tax-free limit?
这个在免税限额内吗？
What are you doing? he asked. I'm cutting this tree up, answered the woodcutter.
“你在做什么？”他问。“我在把这棵树砍断，”伐木工人回答道。