B · TOPIK 3–4Noun
난제
difficult problem
NOUN
난제
NOUN
difficult problem
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In sentences from our articles
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These economic burdens and technical challenges significantly influence policy formulation by governments of each country, and sometimes act as factors that slow down the transition speed.
The challenges of the energy transition · TOPIK 5 →, , .
It is a complex and difficult problem that encompasses various aspects such as society, environment, and ethics.
The Debate on the Perpetuity of Economic Growth · TOPIK 6 →