несовер.
без доп. appear
follow
be clear/obvious из этого явствует, что – hence it appears that, hence it is clear/obvious that, it is clearly follows that
явств|овать - несов. be* obvious, appear, be clear, apparent
из всех показаний ~ует... the evidence shows clearly..., it is obvious from the evidence given
как ~ует из его слов as his words clearly prove