当熊猫宝宝开始自己可以啃咬竹子时,这些科学家们知道他们的实验会成功的。

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问题 当熊猫宝宝开始自己可以啃咬竹子时,这些科学家们知道他们的实验会成功的。

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答案The scientists knew that their experiment would succeed when the panda babies began to bite and eat bamboo all by themselves.

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