The flotation samples from the excavations allowed botanists to study shifts in plant-collecting habits as if they were looking through a telescope at a changing landscape.
从挖掘物中获取的浮选样本让植物学家能够研究植物采集习性的转变，就好像是用望远镜观察不断变化的景致。
2
Prudential's flotation will be the third largest this year, behind Kraft Foods and Agere Systems.
保诚公司的股票发行量今年将排名第3，仅次于卡夫食品和杰尔系统。
《柯林斯英汉双解大词典》
3
Fully agitate and aerify the pulp before flotation.