periodicity

periodicity的英语例句

1. There was a primary periodicity of about 2.8 years for snow cover.

   天山山区积雪变化以2.8a左右的周期为主.

2. Periodicity of nuclear properties began to show up.

   原子核性质的周期性开始显示出来了.

3. Regular irregularities occur with constant periodicity and are usually associated with partial heart block.

   规律的不整脉随固定周期出现,而且常伴有心脏部分传导阻滞.