tree age 中文意思是什麼

tree age 解釋
樹齡
  • tree : n 特里〈姓氏〉。n 1 樹〈主要指喬木，也可指較大的灌木〉。 ★玫瑰可以稱為 bush 也可以稱為 tree 2 木...
  • 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...
  1. The annular markings on a tree indicate its age

    樹的環形紋理顯示其年齡
  2. Form. taxus chinensis var. mairei is protecting plant in the first class, which is a precious and endangering plant in china in this paper, the quantitative characterics of form. taxus chinensis vsr. mairei population including age structure, spatial distribution pattern, growth dynamics of tree basal area, niche characterics, fractal dimension and competition between specises were studied using methods of mathematics ecology from the angle of population ecology of form. taxus chinensis var. mairei, then the prent state and the endangering causes were analysed. this research offers gist to protecting and enlarging the crude resourse of form. taxus chinensis vsr. mairei population, afforesting plantation and sustainable utilize for us

    本文從南方紅豆杉種群生態學的角度、主要應用數學生態學的方法探討南方紅豆杉種群的數量特徵，包括南方紅豆杉種群年齡結構、種群空間格局（探討分佈格局動態規律與生境相互關系） 、不同立地條件下種群優勢度增長趨勢、生態位寬度、生態位相似比例、生態位重疊、空間占據能力及種間競爭等，分析其目前現狀及瀕危原因，期望為南方紅豆杉野生資源的保護和擴大、營造人工林及可持續利用提供理論基礎，也為瀕危植物種群生態學的研究提供參考。
  3. If the borer has been properly located and drilled into the pith, a record of growth and age is obtainable for that position on the tree.

    如果生長錐放的位置適當，鉆入木髓即可得到樹木那個部位的生長記錄和年齡。
  4. Originally found gnawing at the roots of the world tree during an excavation, this magnificent chimaera ' s age is impossible to determine

    這頭雄偉的雙頭龍，是在一次挖掘行動中被發現寄巢於世界樹的重重深根之下，他的歲數已是無法計量。
  5. With the four forest community ' s age nearly the same, the order of different forest ground biomass of single tree was quercus liaotungensis > betulaplatyp hylla > popular davidiana > pinus tabulaeformis

    該研究揭示了森林群落自然演替的規律，對森林群落的經營管理和在黃土高原丘陵溝壑區進行林草植被建設和生態環境重建具有特殊意義。
  6. The bird community composed by the birds that nest on the ground only in younger manpower forest, and the bird community on ground replaced by birds that nest on trees following the increase of tree age

    在林齡較小的人工林中，鳥類群落僅由在地面繁殖的鳥類組成，隨著林齡的增加，逐漸演替為樹上營巢鳥類群落。
  7. We choose the forest appearance tidiness, representative stands serving as standard plots, 40 stands were set up at qinling, hanzhong, huanghong in shaanxi respectively, measure every tree in the stands, measure the actual increase by the dominance tree, the time series model of individual age and diameter of quercus variabilis was established according to the actual diameter of quercus variabilis population by the fluctuant time series, the comparison of simulation and reality value of the every stand of quercus variabilis population diameter increase through the four models, the average simulation difference within 1. 5 %, the accuracy is 97. 8 % the simulation effect is better

    在陜西的秦嶺、漢中、黃龍地區選擇林相整齊、有代表性的地段作為標準地，設置樣方40個，對各樣方內的林木進行每木檢尺，通過優勢木解析的方法，測得栓皮櫟種群胸徑的實際生長量，運用起伏型時間序列分析，建立了栓皮櫟種群個體年齡與胸徑生長的時間序列模型，四個模型所得的各個樣地栓皮櫟胸徑生長的模擬值與實際值進行比較，其模擬平均誤差都在1 . 5 %以內，平均精度達到97 . 8 % ，模擬效果較好。
  8. Age structure of main tree species in community of tilia broadleaf korean pine forest on northern slope of changbai mountains

    長白山北坡椴樹闊葉紅松林群落主要樹種的年齡結構研究
  9. All the painful, thousand years gains of man in his upward climb through creation were lost. only the electric light remained, a milestone on the path of the great human adventure. martin and cheese - face were two savages, of the stone age, of the squatting place and the tree refuge

    人類萬余年來在創造的過程中，在向上發展的階梯中所取得的進步已蕩然無存，只剩下了電燈光，那是人類偉人的冒險歷程中的一個里程碑馬丁和乾酪臉都成了石器時代的野蠻人，穴居野處構木為巢。
  10. Maximum efficiency is obtained by the continous reappraisal of the breading-value of each selected tree as it approaches rotation age.

    只有到樹木接近輪伐期時，對所選的每株樹木的育種值，應作反復多次的評價，才有可能獲得最大的效益。
  11. If an ice - age love poem written to a tiny flower were hidden under a big tree, of what emotions would it speak

    如果一封塵封在大樹底下，來自冰河時期的獻給小花的一首情詩，將訴說什麼樣的情感？
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