community periodicity

• 群落周期性

community periodicity的用法和样例：

例句

1. Periodicity of nuclear properties began to show up.
   原子核性质的周期性开始显示出来了。
2. Slubby yarn is divided into periodicity slubby yarn and random slubby yarn.
   将竹节纱分为周期性竹节纱和随机竹节纱。