Sentence examples for two main difficulties from inspiring English sources

But there were two main difficulties.

According to "Queering Statistics", a seminar that took place at the Royal Statistical Society in Britain in 2006, two main difficulties face a statistician trying to work out how many people are gay: what to measure (behaviour, desire or identity) and how to collect information in a way in which people understand and accept.

Two main difficulties face this approach.

There appear to be two main difficulties with this view.

However, there are two (main) difficulties in this study.

There are two main difficulties in doing this.

This model exhibits three main difficulties.

And three main difficulties faced in the system are discussed.

There have been three main difficulties that we have overcome with some assumptions and left their discussions to further studies.

There are three main difficulties to achieve this task: (1) how to quantify molecular structure; (2) identify which are the relevant structural descriptors (or structure derived) that are the most adequate for the problem at hand; and (3) how to actually map the descriptors selected to the property being modeled [20 22, 56, 57].

Furthermore, we will see in the later that the presence of brings us three main difficulties: (1) the Green's function cannot be explicitly expressed; (2) the equivalence between BVP (1.1) and its associated integral equation has to be proved; (3) the compactness of associated integral operator has to be verified.