Experts said there was still no experimental evidence to prove that the drop in crime was a direct result of efforts to clean up city neighborhoods.

VOA: special.2009.03.03

And again there, too, you saw an experimental result you were presented with that says, well at least to the extent that it could be measured, it was obviously getting very small.

再一次，你看到了一个,你经知道的实结果，至少在实验测量的范围内，对理想气体条件下的气体这一项很小。

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