Although the states are conceptually clear, it is not necessarily the case that translators can judge the state of a given translation consistently, because judging a sentence as being "natural" or "confusing" is not a binary process but a graded one, and the distinction between different states is often not immedi-ately clear.
in this paper, we examined the factors that trigger modifications when translators are revising draft translations, and identified computationally tractable features relevant to the modification.