Swearwords, or curses, have not been studied much as a linguistic phenomenon.

詈语就是骂人的话，作为一种语言现象，研究得十分不够。

youdao

However both systems with MMPP (2) arrival processes have not been studied in open literatures.

但对上述排队系统引入MMPP(2)到达，这在国内外公开发表的文献中还未曾见到。

youdao

However, its incidence and clinically related factors in lumbar stenosis patients have not been studied.

然而，其在腰椎管狭窄症患者中的发生率和临床相关因素尚无研究。

youdao

Although the effects of the metals in this dust have not been studied directly in humans, their behaviour in the laboratory has been observed.

BBC: Railway tracks

Many patients get it at low doses for uses that have not been well studied, such as treating insomnia and agitation in Alzheimer's disease.

FORBES

Stevens said that Manet's portraits have "not been studied in either exhibition or book form" before, despite the artist's "unswerving commitment to the genre of portraiture throughout his career".

BBC: Manet portraits head for London's Royal Academy