在中美力量对比发生迅速改变的时期，两国关系如何演变势必成为其所关注的目标。
How this relationship evolves during a period when the balance of power between them is shifting so rapidly is inevitably a cause for concern.
苏联人开支增多，美国按比例来说开支减少，这两种情况加在一起，改变了军事力量对比，削弱了我国的威慑力量。
The combination of the Soviet's spending more and the U. S. spending proportionately less changed the military balance and weakened our deterrent.
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