单词	polar bear
释义	polar bear noun A large white arctic bear which lives mainly on the pack ice. It is a powerful swimmer and feeds chiefly on seals. Thalarctos maritimus, family Ursidae. If you doubt that, consider which bear will live more effectively if transported to the tropics - a polar bear or a black bear.... A hundred other wildlife species, from polar bears to Arctic foxes, also rely on this unique wild jewel. Multiple bear species, including polar bears and grizzlies, have been crossbred in zoos.
随便看	sialagogue sialic acid sialidase Sialkot Siam siamang Siamese Siamese cat Siamese fighting fish Siamese twins Siam, Gulf of Sian sib Sibelius, Jean Siberia Siberian Siberian tiger sibia sibilance sibilancy sibilant sibilantly sibilate sibilation Sibiu

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