At one point the railway line goes across the road.
这条铁路有一处跟道路交叉。
So there is one point on this second line.
所以这是第二条线上的点。
Hence, only one field line can pass through each point of the field.
因而，在每一点处只能通过一条电场线。
So there is one point on this second line .
所以这是第二条线上的点。
At one point the railway line goes across the road.
在一个地方铁路与公路交叉。
At one point the railway line goes across the road.
在一个地方铁路与公路交叉。
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