Ask one of the persons to be on the sustaining application for 50% of his time.

问其中一个人要对持续的应用，为50 %，他的时间。

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At the same time we are sustaining unprecedented economic losses.

同时，人们也由此蒙受着空前的经济损失。

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At the same time we are sustaining unprecedented economic losses.

同时，人们也由此蒙受着空前的经济损失。

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