v.交易，经商( trade的过去式和过去分词 )；交换；经营…交易，做…的买卖； 双语释义：n.(名词)[U]贸易,商业,买卖 exchange of goods or services for money or other goods[C]行业,生意 business of a particular kind[C]谋生手段,手艺,职业 way of making a living, especially a job that involves making sth; occupationv.(动词)v