English teachers and researchers have long been engaged in the study of teaching methods, but so far they have not found a method that is applicable to all language contexts.

英语教师和研究工作者一直致力于教学法的研究，但迄今也没有找到能针对所有语境的万能教学法。

youdao

I have long been engaged in garment trim (waste textile) acquisition.

本人长期从事服装边角料(废纺织)收购。

youdao

We have established excellent R&D teams and professional technology support teams, which have long been engaged in development and technology support, and have gained rich experience.

傲硕建立了优秀的研发团队和专业的技术支持团队，长期从事开发和技术支持，积累了大量的经验。

youdao

The pair have been engaged in a long-running conflict with Sark's leaders.

BBC: Barclay brothers in Sark High Court battle

We should have been engaged over a long period of time, in a serious way, at least through diplomacy, not to allow this to get to a crisis situation where it now is.

CNN: Dems slam White House on Haiti policy