The start timer displays the seconds counting down to zero (the starting time), sounds an audible electronic warning ten seconds before zero, then once every second from five seconds before down to zero, and once again five seconds after zero.是什么意思_The start timer displays the seconds counting down to zero (the starting time), sounds an audible electronic warning ten seconds before zero, then once every second from five seconds before down to zero, and once again five seconds after zero.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句