新买家为这种材料确定了十几个新货源，其中大多数证明是可靠的。
The new buyer identified a dozen new sources for the material, most of which proved to be reliable.
这个实验不一定证明了海豚知道自己不确定答案，只能证明海豚想避免消极后果罢了。
The experiment didn't necessarily indicate that the dolphin had knowledge of its own uncertainty, just that it wanted to avoid negative consequences.
他们对猴子和海豚进行了研究，提供证据证明这些动物具有感受不确定性的能力。
They did studies with monkeys and dolphins that provide evidence that these animals have the ability to feel uncertainty.
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