touchstones
n.
试金石, (检验)标准( touchstone的名词复数 );
例句:
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Calamity and prosperity are the touchstones of integrity.
不幸与幸运都是正直的试金石.
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His music does present fairly familiar touchstones.
来自BBC
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The design also includes smaller images of fries and other Belgian touchstones.
来自WSJ
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Vaccines and antibiotics have long been seen as touchstones of medical progress.
来自NEWYORKER