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| they | tarnish |
| I | tarnished |
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| I | have | tarnished |
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| he/she/it | has | tarnished |
| we | have | tarnished |
| you | have | tarnished |
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单语范例（未经PONS编辑处理）
Financial troubles and empty promises from a string of four owners had severely tarnished the park's image.
en.wikipedia.org Upon contact with air, it begins to tarnish by forming a complex mixture of compounds depending on the conditions.
en.wikipedia.org The whole exterior was covered with a coat of clear varnish to prevent tarnishing.
en.wikipedia.org Dark tarnish spots are sometimes located on the surface and may need to be polished more than once to remove.
en.wikipedia.org His image was subsequently tarnished, and he lost a reelection bid.
en.wikipedia.org