基本解释n.周期名词period的复数形式.同根派生 periods相关词英汉例句用作名词 (n.)The bitch's cycle is divided into four periods.母犬的发情周期被分为一下四个阶段。Timer must be disabled when graphing readings for extended periods.当在观看较长周期的图形和读值时，必须关闭定时器。periods更多例句