达拉·维佛尔，一位德保罗大学繁忙的芝加哥校园的交换生，说她去年回到慢节奏的加州萨克拉门托的父母住处的经历几乎算得上是文化冲击。
Darla Weaver, a transfer student at DePaul University's bustling Chicago campus, says going back to her parents' house last summer in sleepy Sacramento, Calif. was sort of a culture shock.
如果有大量的数据交换更会特别的慢。
It would be especially slow if large datasets were exchanged.
在行波管中，慢波系统是进行注波互作用实现能量交换的核心部件，其性能优劣直接决定了行波管整体的性能。
Since the slow-wave system is the core of beam-wave interaction in TWT, the function and performance of it directly determines the capability of the TWT.
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