Though often viewed as a problem for western states, the growing frequency of wildfires is a national concern because of its impact on federal tax dollars, says Professor Max Moritz, a specialist in fire ecology and management.
火生态学与管理专家、教授Max Moritz表示，尽管野火频发常被视为西部州的问题，但由于其对联邦税收资金的影响，这一现象正在成为全国性的关注问题。
Researchers analysed the frequency and impact of gaps greater than 2 seconds daring conversations, including an overview of previous studies which indicate that the fear of awkward silences can be so extreme that people avoid taking to strangers, even though doing so is likely to be an enjoyable experience.
研究人员分析了对话中超过2秒的沉默频率及其影响，包括对之前研究的综述，这些研究表明人们对尴尬沉默的恐惧可能极端到避免与陌生人交谈，尽管这样做可能带来愉快的体验。
Their frequency has markedly decreased.
它们的频率明显下降了。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。