adv. 周期性地;定期地,偶尔
网络 周期性地; 定期地; 定期的
Mailing lists are updated periodically.
邮寄名单定期更新。
Meetings are held periodically to monitor progress on the case.
定期召开会议监控案件的进展情况。
Periodically, starfish population explodes.
海星的数量会周期性地激增。
For reasons not fully understood, the field itself reverses periodically every million years or so.
由于一些尚不完全清楚的原因,该领域本身大约每隔百万年就会周期性地翻转一次。
It might be that yawning helps to clear out the lungs by periodically lowering the pressure in them.
打哈欠可能通过周期性地降低肺部的压力来帮助清理肺部。