如果一架列車以光速運行 車上的女孩在裡面跑步 那女孩會否超越光速？

The situation described in this question cannot happen at all, as the Special Theory of Relativity says that no object (with a certain rest-mass) can reach the speed of light. Hence, the train so described cannot travel at light speed.

If we modify the original question, suppose the train travels at a speed just below the speed of light, then the speed of the running girl that you measured will still be lower than light speed. This is due to the fact that light speed is independent of the speed of the source, and which forms one of the basis upon which Special Relativity is established.
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