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I . trace [treıs] 动词 trans

3. trace:

trace
trace

II . trace [treıs] 名词

trace element 名词

单语范例(未经PONS编辑处理)

英语
Lab rat behavior patterns and responses to learned behaviors were studied both with and without trace amounts of carbon monoxide.
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Aside from being inefficient, sodium as a desiccant (below its melting point) reacts slowly with trace amounts of water.
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The panorama later disappeared and historians have not been able to trace it.
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Concern was also expressed that the DVLA would not be able to trace 1 in 12 of those not paying.
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I can trace my interest in chemistry to my first chemical experiment in school, changing the colour of litmus paper.
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The presence of molybdenum trace impurities occasionally results in a green glow.
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There is a distinct trace of a 10, 20 or 30, followed by a stroke after which the papyrus breaks off.
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It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores.
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These compounds are found in trace amounts, and measured in parts per trillion.
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The most abundant trace gas at 0.934% is argon.
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