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When the dolphins saw themselves in the mirror, they tried to clean the red marks off their bodies.

当海豚看到镜子里的自己时，它们试着擦掉身上的红色印记。

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He knew that the sources of the red-stained grains were generally closer to the North Pole than were the places yielding a high proportion of "clean" grains.

他知道，这些红色颗粒的来源通常更靠近北极，而不是那些产生大量“干净”颗粒的地方。

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Had Triumph vacationers looked up information about the cruise ship through those two agencies before boarding, they would have found mostly clean marks and few red flags.

NPR: No Central Agency Oversees, Inspects Cruise Ships

True to his word, he delivered a clean single to left field off Red Sox reliever Calvin Schiraldi.

WSJ: Gary Carter, Baseball Hall of Famer, Dies

Lush cherryishness (not a word, I know, but that was the feeling), with a plush velvety palate and deep ripe red fruit notes followed with a clean, fresh finish.

FORBES: Want Great Deals In Wine? Look For The Second Label