Fatal road accidents have decreased in frequencyover recent years.
近年来致命交通事故发生率已经下降。
《牛津词典》
2
At present the matching problems between the generator overfrequency protection and turbine over speed protection exist commonly in coal-fired power units.
目前，火电机组普遍存在发电机过频保护与汽轮机超速保护之间的配合问题。
3
An introductory approach to designing for ESD. Understanding the ESD pulse, how passive components react overfrequency, and PCB layout techniques are exposed.