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広範囲, こうはんい
NA-adjective
extensive, vast range, wide scope
彼の研究は広範囲に及んでいる。
See more > common   N1
に
Particle
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
See more > common
わたる, 渡る
Conjugated: わたった
Godan verb, Intransitive, occ. written as 渉る
1. to cross over, to go across
See にわたって, occ. written as 亘る or 亙る
2. to extend, to cover, to range, to span
橋は安全です。車でわたれます。
See more > common   N5