| 单词 | touchstone |
| 释义 | touchstone /tuch"stohn'/, n. 1. a test or criterion for the qualities of a thing. 2. a black siliceous stone formerly used to test the purity of gold and silver by the color of the streak produced on it by rubbing it with either metal. [1475-85; TOUCH + STONE] Syn. 1. standard, measure, model, pattern. |
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