As to that, I cannot be sure.

至于那个，我也不能肯定。

youdao

I cannot be sure.

我不能肯定。

youdao

Unfortunately I favor melanin but cannot be sure from the photos.

然而，我不能从这些图片中确信是黑色素。

youdao

Unfortunately I favor melanin but cannot be sure from the photos.

然而，我不能从这些图片中确信是黑色素。

youdao