object of observation ==> 观察对象 object of private right ==> 民事权利的客体,民事权利客体 ..
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In physical experiments of ancient China, water was not only the object of observation and study, but also an experimental material, and it could sometimes become an experimental apparatus as well.
在中国古代，水既是物理实验观察和研究的对象，也是物理实验材料，有时还能成为实验器件。
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