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1. |
[exp,v1]
▶ to be extremely difficult ▶ to present a major challenge |
2. | A 2017-03-23 05:30:55 Johan Råde <...address hidden...> | |
1. | A* 2017-03-14 15:45:46 Robin Scott | |
Refs: | http://www.weblio.jp/content/困難を極める KM n-grams: 困難を極め 2616 困難をきわめ 313 |
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Comments: | e.g. "倒産した会社からの債権回収は困難を極める" |