基本解释n.周期性;周期数同根派生 periodicities相关词英汉例句用作名词 (n.)Periodicity of nuclear properties began to show up.原子核性质的周期性开始显示出来了。The numbers are not intermixed accidentally but are subject to regular periodicity.这些数字不是杂乱无章的、不是偶然出现的,而是有规律的、周期性的。periodicities更多例句