第一，为你的观点提供有效的证据。
应由警方来评价证据的有效与否。
It was for the police to assess the validity or otherwise of the evidence.
关键证据的性质和有效性将不予以讨论。
The nature and availability of material evidence was not to be discussed.
第三，有证据表明这些材料是有效的，学校可以有所作为。
Third, there is evidence that these materials work, and that schools can achieve something.
有证据显示，禁止塑料带可以有效的解决其问题。
There is evidence that prohibition of plastic bags can work.
这套处理工序成本很高，但没有证据表明这个方法是没有效果的。
All this processing is expensive, but there is no reason why it should not work.
还有证据表明，紫外线辐射可降低免疫系统的有效性。
There is also evidence that UV radiation reduces the effectiveness of the immune system.
他们偶然的共同表现是他们共同出生的有效证据。
Occasionally they showed evidence of being born together. I wanted to thank them both.
问：有没有充分的证据证明褪黑素可以有效地解决睡眠问题？
Question: Is there good evidence on the effectiveness of melatonin for sleep problems?
没有明确的证据表明，他们将是有效的。
“一场有效的辩论必须考虑到所有相关的证据，”他说。
"An effective argument would have to take account of all the relevant evidence," he said.
有些证据能证明它是有效的。
然而尚没有证据支持这个基于这些因素的计划的有效性。
The evidence of the effectiveness of a program focused on these factors is still unknown.
但是并没有足够的证据来判断这对所有人都是行之有效的。
But, he says, there is not enough evidence to justify measuring these in everybody.
并没有心理治疗是有效益的证据。
之后出现的证据表明，这种方法没有效果。
有效地提高了计算机安全保护和证据获取的效率。
It can improve the efficiency of the computer secure protection and the access to evidence.
这些结果提供证据的过程中的有效性。
这些结果提供证据的过程中的有效性。
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