Herons Ardeidae, sparrows ( Passerinae ) and common magpies ( Corvidae ) are suggested as useful bioindicators of environmental pollution. 建议选择野生鹭类 、 麻雀和喜鹊等鸟类作为指示生物监测环境中的重金属污染.
The architect specified oak for the wood trim.那位建筑师指定用橡木做木饰条.It is generated by some specified means.这是由某些未加说明的方法产生的.Tickets must be bought seven days in advance, with outward and return journey dates specified.购票需提前7天，并...
She picked up the gauntlet in her incisive Keynote Address to the Conference.在大会主题发言中，她言辞犀利地回应挑战。Luxury car firm Jaguar has thrown down the gauntlet to competitors by giving the best guarantee on the market.豪华轿车生产商捷豹公司推出...