英语牛人们,Some economists believe that only by balancing their b

A 用倒装
only与倒装语序
only所修饰的副词、介词短语或状语从句位于句首时,要用倒装语序.如：
Only then did I realize the importance of health.
到那时我才认识到健康的重要性.
Only thus can we finish the task ahead of time.
只有这样我们才能提前完成任务.
Only in this way can you learn from your mistakes.
只有用这种方式你才能从你的错误中吸取教训.
注意：only修饰主语时,句子不需要倒装.
Only he knows the truth.
只有他知道真相.
Only socialism can save China.
只有社会主义才能救中国.
Only she understood him.
只有她才理解他.
Only very careful readers can find this mistake.
只有非常细心的读者才会发现这个错误.