"they made inroads in the United States market"
They protested against..Papal inroads on the liberties of the Church.
The Ninth Earl..had..made considerable inroads into their immense wealth.
Democrats have made substantial inroads among affluent upper-middle-class voters.
牛津高阶第八版
美国韦氏词典
Dictionary.com
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维基百科 (自由的百科全书)