How many words and word combinations from Unit 3 do you know?

to be entirely / relatively new There is much to be said … about…

to open a whole range of new opportunities

to lead to a paradox

There may be (are) instances, questions, data and results which are

uncertain / about which we are uncertain.

to contend … about smth.

some details remain unresolved

to reflect our lack of knowledge about …

to leave many questions open

It seems surprising to find … that…

New data hint at the existence of … gaps / lack of knowledge

to be not at all clear for a researcher

with regard to the area of investigation

There is an acute need for the revision of…

to be faced with the new opportunities

Here a new set of terms (ideas, explanations, conditions, notions)

is offered.

My hypothesis … is based on a careful estimate …

My proposals … seem to solve the problem of…

The mechanisms proposed (in my work … will actually generate …

There are no clear ways of testing ….

Our knowledge of (in) this sphere is scant and fragmentary.

This question is not accurately formulated.

Lack of objective data has been a serious obstacle to understanding this

problem.

There is a deeper reason … for…

Progress in this area has been hindered by the lack of information con-

cerning…/

There is a significant shift of viewpoint … here

Nobody yet knows what is …

We know less than we thought we knew about.

(Comparatively) little is known … about …

to be not known at the present / to remain unknown

to reflect our lack of knowledge about …

to be complex and still poorly understood …

While much has been written on the subject…

little is known about …

In this area of study … much remains to be done.

No solution… has been offered so far.

There is no … clear way … testing …

ARGUMENTS, REASONS and CAUSES

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