我当时没有明确而具体的证据。

I had no concrete evidence.

《柯林斯英汉双解大词典》

营销人员必须明确证实其在产品包装上做的广告，并将这些广告限定为一个具体的益处，例如有多少产品被回收利用。

Marketers must qualify their claims on the product packaging and limit them to a specific benefit, such as how much of the product is recycled.

youdao

在构建我的时间表中，具体的日期和月份可以很明确的找到，但是，这些日期还不能被认为是绝对的。

In constructing my timeline, it was necessary to decide on a particular day and month but these are not to be taken as absolute.

youdao

The Taylor rule specifies specific variables and everybody at the markets would understand the rule, ? and that's correct, right?

像泰勒规则就明确了具体的变量,市场中每一个参与者也都能够理解，这个没错吧？

斯坦福公开课 - 经济学课程节选