研究表明，这两种对比剂的肾损害没有差别。
That study shows there is no difference in kidney injury between those contrast agents.
但是，受对比剂损害后的肾功能大多会好转。
But the kidney function after the injury from contrast media always seems to get better.
除了作为对比的标准外，安慰剂本身就是一个研究主题。
Besides being benchmarks, placebos are a topic of research in their own right.
对比了两种催化剂体系中采用不同活性组分的催化剂催化性能的差异。
The performance of catalysts with different active components in each system was compared.
对比了两种催化剂体系中采用不同活性组分的催化剂催化性能的差异。
The performance of catalysts with different active components in each system was compared.
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