touch-needle
A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for testing the purity of gold or silver articles by comparison of the streaks made by the article and the bar on a touchstone.
(rare) A very severe, widespread catastrophe.
In the manner of heating in an airtight bag for an extended period of time at relatively low, but tightly controlled temperature.
present participle of outnerve
宝石商は、指輪を金銀の小さな試験棒にこすって、跡を比べて純度を確認した。
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DiQt（ディクト）
無料
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