But, there are certain basic ideas that must be used in every program if maximum results are to be obtained.
但是要想获得最佳效果，在每个安全措施中，都要遵循某些基本的观念。
Fourth, there must be domestic support in the United States, which is usually obtained by congressional backing.
第四，美国需在国内获得支持，而这通常就需要获得国会支持。
Fourth, there must be domestic support in the United States, which is usually obtained by congressional backing.
第四，美国需在国内获得支持，而这通常就需要获得国会支持。
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