John's grade was much higher than usual and he might have cheated, but his professor gave him the benefit of the doubt.
约翰的成绩比平常高得多，有作弊嫌疑，但他的教授因找不到真凭实据而只能信其无。We don't know any of this for a fact, as disease and war have limited the world's experience with whole societies aging.
至于说疾病和战争限制了全球老化着的社群的消费，这方面我们还没有真凭实据。One possible explanation is exposure to testosterone in the womb, but so far, that remains more a curiosity than a clue.
有一种解释是说因为这样的人在母腹中时接触了更多的丸激素，不过到目前为止，这还只是一个猜测，尚无真凭实据。Can I make a report to the ICAC even if I do not have concrete evidence?
若我没有真凭实据，可否向廉政公署举报？nowadays's TBT already became the international trade the bottleneck to have the ironclad evidence.
对应的中文（二）、现今的TBT己经成为国际贸易的瓶颈是有真凭实据的。But suffers the attack Fang Xinzhong also to understand that, or already had someironclad evidences, but or was reluctant to part from.
而遭受打击的一方心中也明白，或者是已经有了一些真凭实据，可还是恋恋不舍。A troubling footnote, to be sure, but the science was relatively new and unsettled.
尽管当时在科学上还拿不出确凿有力的真凭实据，但这个脚注却开始令人不安起来。The essential goal is to uncover substantive, factual material that affirms your argument.
研究目的在于找出真凭实据以支持你的论点。I knew we had no real offense to hang on him.
我知道我们没有掌握他什么犯罪的真凭实据来制服他。