n. ***gunpowder详解释义 gunpowder n.(名词) *** 黑色*** 有烟*** ***安定性 *** Noun a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks...

发布时间：2025-11-01 浏览量：3