In 1999, there were 42 applications for the use of pyrotechnics in the production of television programmes and theatrical performances, and three applications for the use of devices containing explosives in film production.是什么意思_In 1999, there were 42 applications for the use of pyrotechnics in the production of television programmes and theatrical performances, and three applications for the use of devices containing explosives in film production.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句