| 1. | The oldest sediments cored to date are about 150 million years old .
到目前为止取出的最老沉积物的岩心是大约15亿年以前的生成。 |
| 2. | Ultrasonic measurement of seafloor sediment cores
海底柱状沉积物超声测量 |
| 3. | The oldest sediments cored to date are about 150 million years old
到目前为止取出的最老沉积物的岩心是大约1 5亿年以前的生成。 |
| 4. | Sediment cores from lake titicaca itself also chronicle the event , showing a 33 - foot drop in the lake level at the time
提提卡卡湖沉淀物的岩芯也记载了这一事件的年代，表明在当时湖面下降了33英尺。 |
| 5. | Researchers found the same telltale signature of drought in a deep - sea sediment core drilled from the gulf of oman
研究人员在从阿曼海湾的深海沉积物中钻取的岩芯中发现了同样能说明问题的旱灾的迹象。 |
| 6. | It is possible for us to detect the relation among ecology , environment changes , climate variance and human activities by studying the penguin dropping sediment . the sediment core was collected from the shore on the ardley peninsula during the eighteenth china antarctic research expedition using a 12cm - diameter pvc pipe
南极企鹅在某些地区是生态系统的主要影响因子，企鹅粪便沉积物记录了上千年企鹅数量和分布的变化规律，从而可以反映气候、环境变化和环境污染、人类活动等因子对生态系统的影响。 |
| 7. | Polychlorinated dibenzo - p - dioxins and dibenzofurans ( pcdd / fs ) in surface sediments at 7 stations , 1 sediment core and 2 mussels from qingdao coastal sea were analyzed using hrgg - hrms . the highest level was an order of magnitude higher than at other stations . the horizontal distribution of the total 2 , 3 , 7 , 8 - substituted pcdd / fs in the sediments formed an east - west pattern
用高分辨率气相色谱一高分辨率质谱方法( hrgc一hrms )对表层沉积物( 7个) 、岩心沉积物( l个)和贻贝( 2个)中的多氯代二苯并二恶英/吠喃( pcdd / fs )进行了探讨。 |
