因此，当一个领域状况发生逆转，投机者就会撤出资金来降低风险和保护自己的资本，这会使这种撤出效应会迅速传播。

So, when one of these positions reverses, the effects spread rapidly as speculators bail out of their positions to reduce risk and preserve their capital.

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“我们希望在这种凝胶中放入一种抗逆转录病毒制剂，从而起到另一层的保护作用。”他说。

We would want to put an antiretroviral agent in the gel, to act as another level of protection, "he says."

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他呼吁人们像保护袋獾那样去防止这种逆转录病毒在考拉之间的蔓延。

He has called for support akin to that given to help protect the devils to stop the spread of the koala retrovirus.

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