Hitec
硝酸钾、硝酸钠、亚硝酸混合物
🗣️ 情景例句
But his teeth hurt, and he just can't get to sleep, poor dear.
但他的牙疼， 他不能入睡， 可怜的小宝贝。
Boy Scouts serve the community.
童子军服务社区。
A great many goods were sent to the exhibition from various parts of the world.
大量的商品从世界各地运送到了博览会，