boundary
C1高頻度 NGSL-3英 /ˈbaʊndri/米 /ˈbaʊndri/
意味
noun
境界線
a real or imagined line that marks the limits or edges of something and separates it from other things or places; a dividing line
“After the war the national boundaries were redrawn.”
実際の動画で boundary を覚える
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