Since repair expenses of damaged property required only 4,000 dollars, the remaining 8,000 dollars was turned over to the student activity fund.

由于修理损坏的财产只需要4000美元，那么我们将剩下的8000美元交给了学生活动基金。

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The practical skill required for this activity is to be able to flatten a hierarchical (tree-like) structure.

此活动所需要的实际技能是能够平面化层次(树形)结构。

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No installation is required and all activity can be tracked and logged.

无需安装，可跟踪记录所有的活动。

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We were closely monitored by the FSA whilst we performed activity that required regulation (the selling of insurance).

BBC: What threat to banks from internet lenders?

Banks are required to report suspicious activity to the government and to put in place rules meant to make money laundering impossible for customers.

WSJ: Fed tells Citi to improve anti-laundering systems

Rapid task switching, which may look like multitasking, is common and required for many types of activity.

FORBES: Multitasking: Good Or Bad?