- blue chip (adj.)
[blue chip 词源字典]
- also blue-chip, in reference to the high-value poker counter, from 1904 in the figurative sense of "valuable;" stock exchange sense, in reference to "shares considered a reliable investment," is first recorded 1929; especially of stocks that saw spectacular rises in value in the four years or so before the Wall Street crash of that year.[blue chip etymology, blue chip origin, 英语词源]