Lester: But can Aaron help us pin them down?

雷斯特：但艾伦可以帮我们找到这样的人吗？

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But it has been difficult to pin down the exact relationships between them.

但要准确定义它们之间的关系还是有困难。

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But it has been difficult to pin down the exact relationships between them.

但要准确定义它们之间的关系还是有困难。

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