Previous research on inversion has been done at the syntactic level.

以往的倒装句研究是在句法平面内进行的。

youdao

I wish to advise you that business has been done at 100 yuan per ton.

我愿告诉你有笔生意已按每吨100元成交。

youdao

The theory and research about this new kind of structure has been done at some extend.

对这一新兴结构体系的理论研究正在铺开。

youdao

"The far worse damage has been done to millions of American families who did nothing wrong at all.

VOA: standard.2010.03.16

That is in keeping with the regular outreach that has been done at a staff level by the White House.

WHITEHOUSE: Press Briefing

"Attaching clipper blades to handles to create grooming tools for hairy animals, and in particular at least horses, has been done since at least 1958, " Mr. Laube's lawyers wrote in an April court filing.

WSJ: A 'Comb on a Stick' Creates

Nothing like that has been done before, at least not en masse.

FORBES: Sherry Turkle: I'm in Google, Google's in Me