The authors of the United States Constitution attempted to establish an effective national government while preserving autonomy for the states and liberty for individuals.

美国宪法的起草者试图建立一个有效的国家政府，同时保持各州的自治和个人的自由。

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She wants to know which strategies are most effective for preserving their health.

她想知道什么办法能最有效地保证他们的健康。

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CONCLUSION: The method is easy, feasible, quick, economic and effective in preserving bad tooth.

结论：桩冠修复方法可行，是一种简易、快速、经济、有效的保存患牙方法。

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In assessing prospective cuts and future defense programs and force structures, particular attention must be paid to preserving an effective technology base.

CENTERFORSECURITYPOLICY: Center for Security Policy | A Scorecard On The Defense Budget: Preserving Key Priorities And Programs In An Era Of Cuts

Security Council to become an effective mechanism for preserving international security.

CENTERFORSECURITYPOLICY: Center for Security Policy | Center Debunks Claims Of New ��World Order��; Lauds Cuomo View Of Soviet Agenda In Mideast

The subsidy is all the more objectionable when so much of it seems to go into shareholders' and executives' pockets and on a huge, and so far effective, lobbying effort aimed at preserving its status.

ECONOMIST: The mortgage giant loses its boss and looks for capital