Mineshaft
01
a vertical or sloping passageway excavated for mining ore or ventilating a mine
文法情報
例
The mineshaft descended over 2,000 feet before reaching the main ore body.
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語彙ツリー
mineshaft
mine
shaft
a vertical or sloping passageway excavated for mining ore or ventilating a mine
LanGeek
語彙ツリー
mine
shaft