At the link layer, you find Ethernet, the most common high-speed medium.
在链路层上,可以找到以太网,这是最常用的一种高速介质。
The requirement on speed actuation is refined by the possible selection for speed: slow, medium, or fast.
快速启动的需求由可能的速度选择细化:慢速、中等或快速。
But the complexity of the new High Speed Train (HST) system is such that a medium-term risk assessment will be necessary.
但是,由于新的高速铁路系统极为复杂,因此有必要进行中期的风险评估。
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