Look for the hidden animals.

寻找隐藏的动物。

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Creative teacups from Japan come with hidden animals inside.

来自日本的、里面自带有隐藏动物的创意茶杯。

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Cryptozoology, the study of "hidden animals", concerns itself with animals whose existence has not yet been recognized by mainstream science.

传说动物学，关于“隐秘动物”的研究，与动物相关但是尚未被主流科学认可。

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The animals did a good job of staying hidden from sight.

VOA: special.2009.06.16

When they hit dry stretches, their animals are at risk from giant anteater holes hidden in the 4-foot-tall grasses.

FORBES: Journey: Painful pleasure

Edinburgh Zoo said it had hidden nothing from the public and that officials had been left with no option other than to destroy the animals.

BBC: Zoo kills endangered antelopes