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關注：1
2013-05-23 12:21
求翻譯：(b) the signs of the coefficients (e.g. why is the sign of out-of-vehicle travel time negative or the sign of household size positive?, etc.);是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
(b) the signs of the coefficients (e.g. why is the sign of out-of-vehicle travel time negative or the sign of household size positive?, etc.);
問題補充： |
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