Spectrum analysis showed that the main period of low frequency sea level variations at both coasts was annual, while that of sea level differences between the two coasts was semiannual.
谱分析显示，两岸的水位低频变化均以年周期为主，但两岸间的水位差却以半年周期为主。
While any period can experience various degrees of frequency and amplitude, the period from 1914 through the end of the Cold War is best characterized as high-frequency, low-amplitude conflict.
任何一个时期都具有不同程度的频度和烈度，从1941年到冷战这段时期最合适于用高频度，低烈度冲突来描述。
The peak value of lightning frequency and rainfall period is consistent, the merger of medium and small scale rain cluster and low-layer convergence is one of the causes for short-term rainfall.
闪电频数与强降水时段的峰值较一致，中小尺度雨团合并和低层辐合是造成短时强降水的原因之一。
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