日本的决策者们担心，如果日本无法在出现危机时向美国提供帮助，则美国国会可能终有一天会想知道，到底为什么美国人必须做出那么多的承诺去保卫日本。
Japanese policymakers worry that if Japan cannot come to America's help in a crisis, Congress might one day wonder why on earth Americans should be committing so much to defend Japan.
第二天，俄罗斯派遣空降兵保卫俄罗斯位于该国北部的坎特空军基地。
A day later Russia dispatched paratroopers to secure its Kant military base in the northern part of the country.
我们应该为欧洲需要自己保卫其安全的那一天做好准备。
We should be prepared for the day when Europe has to take care of its own security.
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