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- This situation has improved recently with the advent of surface exposure dating (SED) using in-situ terrestrial cosmogenic nuclides. 由于可确定时代的资料缺乏，绝对年代学的建立非常困难。
- The Speech will discuss the physical principles that control cosmogenic isotope production in rocks and provide some examples of surface exposure dating from the literature. 本次报告将讨论有关岩石中宇宙成因核素产率的基本物理原理;并将从发表的文献中;给出暴露年龄测定的某些实例.
- Theory of Cosmogenic Nuclide Surface Exposure Dating and Its Applications in Geosciences 宇宙成因核素测年方法及其在地球科学中的应用
- surface exposure dating 地表暴露测年
- At a surface exposure the host rock dips steeply to the east. 在一个露头处，含矿主岩向东陡倾。
- cosmogenic surface exposure ages 表面暴露年龄
- At a surface exposure the host rock dips steeply to the east 在一个露头处，含矿主岩向东陡倾。
- The gas bubbled to the surface of the water. 气体变成气泡升上水面。
- The surface of the liquid gradually crusted over. 液体表面渐渐地结了一层皮。
- A breeze ruffled the surface of the lake. 一阵微风吹皱了湖面。
- A wave broke across the surface of the pool. 一个波浪从池水表面掠过。
- The calm water surface is very much like a mirror. 那平静的水面十分象一面镜子。
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- He is honest only on the surface. 他只是表面诚实而已。
- A film of mucus and bacteria on a tooth surface. 齿菌斑牙齿表面一层粘液和细菌的膜
- The hard outer portion or surface area of bread. 面包皮面包的表面区域的硬皮
- Surface mail takes longer than airmail. 普通邮件比航空邮件慢。
- The surface of the lake is quite still. 湖面相当平静。
- It's2 yuan by surface mail and3.6 yuan by air. 寄平信2元，寄航空要3元6角。
- Wheels won't bite on a slippery surface. 车轮打滑。
