third rail

名词 n.
中文释义

英文释义

名词 n.
  1. The electrified rail that runs beside or between train tracks to power electric trains.
    — The system voltage is 630 volts d.c. and the supply to the trains is by top-contact third rail with running rail return.
  2. Anything that is controversial or dangerous to come into contact with, or is best avoided. broadly
    — Today's rapidly developing third rail (at least in some states) is supporting driver's licenses for illegal immigrants, as favored by New York Gov. Eliot Spitzer.

词形变化

third rails plural
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