it appears to repeat
much of the text, almost verbatim, and fails to identify
clearly that the work represents a relatively small extension
of that of Suzuki et al.

　　方舟子接受安徽《新安晚报》访问时表示，范维澄等人的论文大部分抄自日
本研究人员的论文，几乎是逐字地照抄，只增添很少的内容，却没有注明资料的
来源，是很严重的学术不端行为。

Were you just translating the Editor's words? Or were you actually making your own judgement?
"却没有注明资料的来源" is indeed a very serious problem if it is true, and it is a really serious allegation.

Please be very careful before you make such serious allegations.