age constraints 中文意思是什麼
age constraints
解釋
年齡約束- age : n 1 年齡。2 成年〈滿廿一歲〉。3 老年，晚年。4 壽命；終生，一生。5 時代，時期，年代。6 〈口語〉很...
- constraints : 變動極限
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On the bases of the galaxy evolution theory, we use the therotical chemical evolution model of three zone ( such as halo, thick disk and thin isk ) and multi - phase ( diffuse gas, molecular clouds, stars of both low and high mass, the remnants ). by comparing with the observational constraints, such assurface densities, age - metallicity relation, g - dwarf metallicity distribution in the solar neighbourhood and the correlation between [ a / fe ] and [ fe / h ], supernovae rates, infall rates. the rationality of the model is verified. based on the theory model, we calculate the abundance of neutron capture element
本文正是在銀河系化學演化的基礎上，利用銀河系的三成分（ threezone ） （即暈、厚盤和薄盤）多相（ multi - phase ） （氣體，分子云，大、小質量恆星以及剩餘物質）的化學演化的理論模型，通過與觀測約束（質量面密度、場星的年齡-金屬豐度關系、太陽附近g矮星金屬含量分佈函數、三成份的特徵量、元素的星系化學演化、超新星的爆炸率、內落速率等）的比較，來檢驗模型的合理性。 -
It takes a quantitative analysis to reveal the direction and intensity of tv violence and simultaneously interprets the meaning of the different indexes form the survey, which provides reliable information about tv violence in china and offers reference for the government policy - making and guidelines for the media development in the right way. what ' s more, it takes a big - scale cross - regional survey, and investigates the regional differences, media contact and the relationship between age, the degree of education and the outlooks of the audience, emphasizing the constraints of the objective reality and the differences of the individuals on the media cultivation effects, which offers a framework for later related research
以量化形式反映電視暴力的指向和強度，同時以質化分析解釋各項指標所蘊含的意義，為了解我國電視暴力狀況提供了非臆想性的可靠資料，為政府有關部門的決策及媒體的良性發展提供參照：進行較大規模的跨地區實證調查，考察了地區差異、媒介接觸及年齡、文化程度等諸多變量與受眾觀念的關系，強調了客觀現實及受眾個體差異對媒介涵化效果的制約，為今後的相關研究提供了可資借鑒的理論框架和操作平臺。 -
With the increasing global demand for oil and gas, the restrictions of oil and gas resources and the constraints of energy technology, the 21st century world oil industry will, compared with the 20th century world oil industry, face more severe tests end challenges, such as the restrictions of oil and gas resources, the growing demand for oil and gas, the constraints of technology, the development of natural gas resources, the exploitation of unconventional oil and gas resources, the emergence of alternative se energy, the coming of the second half oil age and so on
摘要隨著全球對油氣資源需求的不斷增長、石油資源量的限制及技術的制約，與20世紀世界石油工業發展相比， 21世紀世界石油工業將面臨更加嚴峻的考驗與挑戰，如油氣資源量的限制、需求量的不斷增長、技術的制約、天然氣的發展、非常規油氣資源的開采、替代能源的出現和后石油時代的來臨等。
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