Suggestions(5)
Exact(60)
The main difficulty conscripts must endure is constant hunger.
"The main difficulty is getting the thicker returnable bottles.
The main difficulty has been in the interweaving.
The main difficulty for the prospective visitor is travel to the island.
The main difficulty is not knowing what's a trend, what's a backlash, and what's a blip.
The main difficulty is that there are two syllables in people and only one in Queen.
The main difficulty is that the Saudis themselves feel vulnerable to the Islamic fundamentalists.
"The main difficulty is communicating effectively with the public," he said.
The main difficulty is that no one minds overly about India's defection.
The main difficulty is in the computation.
The main difficulty here arises from the lack of compactness.
More suggestions(15)
The salient difficulty
The main inconvenience
The principal difficulty
The main complexity
The basic difficulty
The main trouble
The foremost difficulty
The substantial difficulty
The fundamental difficulty
The main distress
The main constraint
The main disadvantage
The major difficulty
The main dilemma
The main problematic
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com