This paper uses geomath techniques to deal with geological ages and major chemical compostion of volcanics on basis of petrochemical feature, field occurrences and erosion degree and division of volcanism is made into 5 eruption stages and 2 cycles.
本文应用数学地质方法对火山岩地质年龄值和某些重要化学组分进行研究，结合火山岩岩石化学特征、野外产状、风化剥蚀程度等进行分期分类。
The geologist theorized brilliantly about the age of the earth.
这地质学家出色地导出有关地球年龄。
Geologists have calculated the age of the earth.
地质学家已经计算出了地球的年龄.
By this means the age of the earth had been estimated at several hundred million years.
用这个办法推算出地球的年龄是数亿年。
Knowledge about the age of the earth and the sun was very hazy.
人们对地球和太阳年龄的认识相当模糊。
Research on the Depth Vision of Man s Football 14-17 Young Athletes in the Region of North China;
华北地区14-17年龄段少年男子足球运动员深度视觉的研究
Molybdenite Re-Os age and zircon U-Pb age and Hf isotope geochemistry of the Qiyugou gold system, Henan Province.
河南祁雨沟金成矿系统辉钼矿Re-Os年龄和锆石U-Pb年龄及Hf同位素地球化学
Single-grain zircon U-Pb isotopic ages,geochemistry and its implication of the Pulang complex in Ynnnan Province,China.
云南普朗复式岩体锆石U-Pb年龄和地球化学特征及其地质意义
Geochemistry and zircons SHRIMP U-Pb age of volcanic rocks of Aqishan Formation in the eastern area of north Tianshan, China.
北天山东段阿奇山组火山岩的地球化学特征及锆石U-Pb年龄
Racquetball& def weightlifting and bowling are year-round activities.
回力球、重和保龄球都是全年性的活动。
isotopic age determination
同位素地质年龄测定
Eva carries off her age well.
伊娃巧妙地隐瞒了年龄。
disparity in age [position]
年龄[地位]的完全不相称
Analysis on Characteristics of World Elite Male Tennis Player’s Age,Training Years and Body Physique
世界优秀男子网球运动员年龄、球龄与身体形态特征分析
Today, Americans of all ages play baseball.
现在，各个年龄层的美国人都玩棒球。
Fifty years ago, the bowl game was a different ball game.
五十年前，保龄球运动跟现在完全不同。
Analysis of Age,Height and Weight of NBA National Basketball Players;
NBA国际球员的年龄、身高、体重特征分析
Athletic age difference between CBA players and NBA players
CBA与NBA球员竞技年龄段的差距研究
Evidences from Geochemistry and Zircon U-Pb Geochronology of Volcanic Rocks of Yeba Formation in Demingding Area,the East of Middle Gangdise,Tibet
西藏得明顶地区叶巴组火山岩地球化学特征和同位素U-Pb年龄证据