This 65.5-million-year-old layerofEarth separates fossils of the Cretaceous period from those of the Tertiary period.
这个有着6550万年历史的地层分离了白垩纪的化石和第三纪的化石。
2
They have covered pools of blood from the birth with a thin layerofearth and are toasting their daughter with cups of cloudy water.
他们用薄薄的地皮盖住了分娩时的血迹，举起盛满浑浊的水的酒杯庆祝女儿的诞生。
3
The system is also quite effective for locating fires that are smoldering beneath the top layerofearth -- a problem that occurs with wildfires thought to have been snuffed out.