New actions must be taken to prevent air pollution.

必须采取新行动来阻止空气污染。

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Actions must be taken promptly and order be restored as soon as possible.

必须迅速采取行动，尽快恢复秩序。

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In order to deal with this problem, some effective actions must be taken.

为了解决这个问题，必须要采取一些行之有效的措施。

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What is also clearly critical is that effective actions must be taken to keep normal expenditures from rising.

FORBES: Averting a Greece-Like Crisis: The Noda/MOF Plan for Fiscal Reform

Assessments of the safety and performance of stockpiled weapons and actions taken to modify them must be based on demonstrated performance.

CENTERFORSECURITYPOLICY: US Nuclear Stockpile

In particular, there must be no repetition of the sort of actions taken earlier this year by Pentagon acquisition officials that resulted in the precipitous termination, without consulting the White House or the affected military services, of a key Navy anti-missile program needed to defend the fleet and deployed forces ashore against shorter-range ballistic missile threats.

CENTERFORSECURITYPOLICY: Center For Security Policy