在两次专家会谈中，人们已经着手了会议的筹备工作。
The preparatory work for the conference had been undertaken at two meetings of experts.
下周，专家会谈到做什么、不做什么来帮助因酷寒而受伤的人。
Next week, experts talk about what to do, and not to do, to help someone injured by extreme cold.
结果就成了恢复会谈前提条件的难题，即使是最热心的专家也难以解决。
The result has been a Gordian knot of preconditions for resuming talks that even the most ardent expert would be hard-pressed to figure out.
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