p 90的仪表指示数与标准的平均速率越接近，这个站点对投资者吸引力越大。
The closer the P90 reading is to the measured average speed, the more attractive the site becomes to investors.
我们特制的测速仪表现这两列火车的相对速率是每小时20英里。
Our special speedometer shows that the relative speed between the two trains is 20 MPH.
我们特制的测速仪表现这两列火车的相对速率是每小时20英里。
Our special speedometer shows that the relative speed between the two trains is 20 MPH.
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