
n.周期性;周期數(shù)
Periodicity of nuclear properties began to show up. 原子核性質(zhì)的周期性開(kāi)始顯示出來(lái)了。
The numbers are not intermixed accidentally but are subject to regular periodicity. 這些數(shù)字不是雜亂無(wú)章的、不是偶然出現(xiàn)的,而是有規(guī)律的、周期性的。
非周期性
n.非周期性(非調(diào)諧性)