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来源：雅诚德英语网
The first non-aviation contracts were signed in 1986, and by the time much of Yellowstone went up in smoke in 1988, the practice was flourishing.
第一个不包含飞机服务的合同签署于1986年，这类做法一直很盛行，直到1988年黄石公园（Yellowstone）大面积失火。
The first non-aviation contracts were signed in 1986, and by the time much of Yellowstone went up in smoke in 1988, the practice was flourishing.
第一个不包含飞机服务的合同签署于1986年，这类做法一直很盛行，直到1988年黄石公园（Yellowstone）大面积失火。