Exact(4)
It was usually difficult to identify a point in the discussion at which a clear decision was made.
It was usually difficult to hold lengthy discussions about the subject, because hunting was widely understood to be illegal, and therefore a sensitive topic.
However, because of the limited amount of genomic data that were publicly available, it was usually difficult to collect enough data that matched the conditions.
For example, in the cases of Sargasso proteins with less than 60% levels of identity and coverage in the BLAST search, multiple COGs often became the candidates, and it was usually difficult to tell which of the candidates was the proper answer.
Similar(56)
Yes, it's usually difficult to pinpoint elements of autobiography in your work.
It is usually difficult, and frequently impossible, to determine the precise causes of fetal death.
But unlike many other harassment cases, it is usually difficult to identify the culprits because most nooses are left anonymously.
When I think of "America", it's usually difficult to disentangle exactly what I mean by that.
The main benefit is stronger, healthier grass, thicker grass in places where it's usually difficult to grow".
When someone of Mr. Burwick's advanced age dies of pneumonia, it is usually difficult to definitively link it to a single cause, doctors say.
It is usually difficult to get car buyers to give a brand another chance after they have decided it is not for them.
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