It should be noted that this is, and the history of the completion of any of the major theories go through a period of time, like the work of Newton and Leibniz are also far from perfect.

应该指出，这是和历史上任何一项重大理论的完成都要经历一段时间一样，牛顿和莱布尼茨的工作也都是很不完善的。

youdao

It is still suffering for two main reasons - house building remains at an all time low and many of the larger government funded large projects, like the Titanic signature building, are nearing completion without similar work coming through.

BBC: NI economy remains 'fragile'