求翻译：虽然他们在口头上，百般狡辩，企图避开问题的实质，企图掩饰他们的背弃行为，但是“在事实上，他们完全背弃了辩证唯物主义，即背弃了马克思主义。”是什么意思？

Although they are in words, all sorts of sophistry in an attempt to avoid the essence of the problem, they abandon the attempt to cover up acts, but "in fact, they completely abandoned the dialectical materialism, which abandoned Marxism."

Although they verbally, 100 general sophistry, attempted to avoid the substance of the issue, in an attempt to conceal their acts of betrayal, but "the fact that they have totally abandoned the Marxist dialectical materialism, the betrayal. "

Although they orally, in every possible way quibble, attempts to avoid the question the essence, the attempt conceals them to abandon the behavior, but “in fact, they completely has abandoned the dialectical materialism, namely has abandoned the Marxism.”

Though they are in words, the manifold sophistry, attempting to avoid the substance of the issues in an attempt to cover up their broken behaviour, but "in fact, they turned completely away from materialism, that is backing away from Marxism. ”

Although they are in words, all sorts of sophistry in an attempt to avoid the essence of the problem, they abandon the attempt to cover up acts, but "in fact, they completely abandoned the dialectical materialism, which abandoned Marxism."