periodically

adv.

周期性地；定期地，偶尔；

1. New strains of viruses appear periodically.
   新菌系的细菌周期性地产生。
2. The state of knowledge in this field has been surveyed periodically in review papers.
   在一些评论文中对这一领域的动态周期性地进行了评述。
3. Periodically, someone comes by with a truck to fill them.
   有些人定期地用卡车运输食品，装进机器。
4. Drones must return periodically to recharge their weapons and propulsion systems.
   雄蜂一定定期地回复再休整他们的武器和推进系统。

Electronic transport in periodically δヾoped GaAs layers
Characteristic sideband instability of periodically amplified average soliton
Estimating Survivorship when the Subjects are Visited Periodically
Identification of Genes Periodically Expressed in the Human Cell Cycle and Their Expression in Tumors
Quasi-phasematched optical parametric oscillators using bulk periodically poled LiNbO3
Terahertz surface plasmon-polariton propagation and focusing on periodically corrugated metal wires.
Phase Locking, Period-Doubling Bifurcations, and Irregular Dynamics in Periodically Stimulated Cardiac Cells
The German bee monitoring project: a long term study to understand periodically high winter losses of honey bee colonies
Design, Synthesis, and Properties of Inorganic and Hybrid Thin Films Having Periodically Organized Nanoporosity†
Graph-theoretic approach to synchronizing stochastic coupled systems with time-varying delays on networks via periodically intermitt...