传记作者不得不在与主题有关的两个摇摆不定的位置之间跳来跳去。
The biographer has to dance between two shaky positions with respect to the subject.
因为说不定哪天你们的位置和关系会发生改变，到时有些往事造成的影响就很难说了。
Because maybe someday you will change the location and relationship to the past when some of the impact is hard to say.
垂直陀螺利用一个陀螺仪作为积分装置以得摇摆不定的重力基准线的平均位置。
The gyro vertical utilizes a gyroscope as an integrating device to obtain the average position of a pendulous gravity reference .
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