gunpowder /ˈgʌnpaʊdə/
举一反三
- Gunpowder Plot was disigned to kill：
- Who is believed to be the inventor of gunpowder?
- Which of the following countries aced in the optimum use of gunpowder?
- Compass, gunpowder, papermaking and printing are the four ancient inventions in China.
- 中国大学MOOC: Which one in the following is not the usage of gunpowder?