虽然两国人民未经许可不能越过边境，但动物可以自由跨过边境。

Though people of two countries cannot go across the border without permission, animals, however, can cross the border freely.

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但当要求其在有蜻蜓、树、鲨鱼、汽车和猴子的照片中找出“动物”时，这个系统就不能胜任了。

Ask it to find "animals" among photographs of dragonflies, trees, sharks, cars and monkeys, and it falls over.

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但具体是何种动物仍不能确定。

Which animal, exactly, is not clear.

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