At the lowest levels of competition,such as youth and high school meets,officials start and time events with a starting pistol and handheld stopwatches.是什么意思_At the lowest levels of competition,such as youth and high school meets,officials start and time events with a starting pistol and handheld stopwatches.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句