(; ) if somebody is long on/in shares, currencies, etc., they have bought them, intending to sell them later at a profit when their value rises买空的；（行情）看涨的，做多头的HELP The forms longer and longest are not usually used in this meaning.longer 和 longest 通常不用于这个意义：◆Traders feel it is unwise to be long on stocks.交易商觉得在股票交易中做多头不明智。◆Investors did not want to be long in dollars due to political uncertainties.由于政治的不确定性，投资者不想做美元多头。OPPshort ▸long
adverb
◆We believe that technology stocks have reached their lowest point, so now is a good time to go long on these shares.我们认为科技股已经达到最低点，因此目前是做股票多头的好时机。●work/have long ˈhours/ˈdaysto work more hours in the day than usual（一天中比平时）工作时间长◆Managers often expect staff to work very long hours.经理们常常希望员工很长时间工作。➡ idiom at long run year-long